diff --git a/CHANGELOG.md b/CHANGELOG.md
index f5f2103ac..21c43c33c 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -3,6 +3,10 @@ All notable changes to this project will be documented in this file.
 This project uses the changelog in accordance with [keepchangelog](http://keepachangelog.com/). Please use this to write notable changes, which is not the same as git commit log...
 
 ## [unreleased][unreleased]
+ - Fixed truncated FPGA upload due to incorrect integer size variable (@d18c7db)
+ - Changed `usart btfactory` - handles the new BT board with version "BT SPP V3.0" (@iceman1001) 
+ - Changed `hf mf eview --sk` - now can extract keys and save to file (@iceman1001)
+ - Changed `hf mf view --sk` - now can extract keys and save to file (@iceman1001)
  - Changed `hf mf sim` - reduce 6ms threshold to 4ms for reset to idle #1974 (@net147)
  - Rebuilt the Spartan-2 `fpga_*.bit` files to include the `hi_iso14443a.v` update (@d18c7db)
  - Added minor orphaned change from `hi_iso14443a.v` in `fpga-xc3s100e` to `hi_iso14443a.v` in `fpga-xc2s30` (@d18c7db)
@@ -22,7 +26,7 @@ This project uses the changelog in accordance with [keepchangelog](http://keepac
  - Changed `hf mf supercard` - Support editing UID and recovery of keys from second generation card (@AloneLiberty)
  - Added iClass credit key to default iClass key table and reorganized key order (@GuruSteve)
  - Changed `hf mf value` - ability to use transfer on different block (@AloneLiberty)
- - Change `hf mf dump --ns` - dump command now supports `no save` of MFC card memory (@iceman1001)
+ - Changed `hf mf dump --ns` - dump command now supports `no save` of MFC card memory (@iceman1001)
  - Added `hf mf gdmsetcfg` - Supprt Gen4 GDM write configuration block (@iceman1001)
  - Added `hf mf gdmcfg` - Support Gen4 GDM read configuration block (@iceman1001)
  - Changed magic note to include a section about GDM tags (@iceman1001)
@@ -62,13 +66,14 @@ This project uses the changelog in accordance with [keepchangelog](http://keepac
  - Added `hf legic info` command for other sources (@0xdeb)
  - Added `hf legic einfo` - views emulator menory (@0xdeb)
  - Changed `hf legic view` - now also print the decoded info of the dump file (@0xdeb)
- - Now `script run hf_mf_ultimatecard.lua -u` supports 10bytes UID (@alejandro12120)
- - Update documentation for installation on macOS with MacPorts (@linuxgemini)
+ - Changed `script run hf_mf_ultimatecard.lua -u` to support 10bytes UID (@alejandro12120)
+ - Updated documentation for installation on macOS with MacPorts (@linuxgemini)
  - Added possible Paxton id to hitag2 tag info output
  - Changed `hf mf sim` - reduce 50ms threshold to 6ms for reset to idle #1974 (@net147)
  - Update `amiibo_tools.lua` with new identifiers and create a python script `update_amiibo_tools_lua.py` to automate the process in the future. (@CorySolovewicz)
  - Added `lf paradox sim --fc --cn` - Simulates Paradox fob from facility code and card number (jerji)
 
+
 ## [Nitride.4.16191][2023-01-29]
  - Changed `build_all_firmwares.sh` to fit GENERIC 256kb firmware images (@doegox)
  - Fixed some coverity fixes (@iceman1001)
diff --git a/armsrc/Makefile b/armsrc/Makefile
index 5024aa1de..5203b0292 100644
--- a/armsrc/Makefile
+++ b/armsrc/Makefile
@@ -77,7 +77,7 @@ else
 endif
 
 ifneq (,$(findstring WITH_EM4x50,$(APP_CFLAGS)))
-	SRC_EM4x50 = em4x50.c
+	SRC_EM4x50 = em4x50.c bruteforce.c
 else
 	SRC_EM4x50 =
 endif
diff --git a/armsrc/appmain.c b/armsrc/appmain.c
index f68739da2..184307042 100644
--- a/armsrc/appmain.c
+++ b/armsrc/appmain.c
@@ -2014,11 +2014,16 @@ static void PacketReceived(PacketCommandNG *packet) {
                 uint32_t waittime;
             } PACKED;
             struct p *payload = (struct p *) &packet->data.asBytes;
+
             uint16_t available;
             uint16_t pre_available = 0;
             uint8_t *dest = BigBuf_malloc(USART_FIFOLEN);
             uint32_t wait = payload->waittime;
+
+            StartTicks();
+
             uint32_t ti = GetTickCount();
+
             while (true) {
                 WaitMS(50);
                 available = usart_rxdata_available();
@@ -2039,6 +2044,8 @@ static void PacketReceived(PacketCommandNG *packet) {
             } else {
                 reply_ng(CMD_USART_RX, PM3_ENODATA, NULL, 0);
             }
+
+            StopTicks();
             BigBuf_free();
             LED_B_OFF();
             break;
@@ -2051,11 +2058,16 @@ static void PacketReceived(PacketCommandNG *packet) {
             } PACKED;
             struct p *payload = (struct p *) &packet->data.asBytes;
             usart_writebuffer_sync(payload->data, packet->length - sizeof(payload));
+
             uint16_t available;
             uint16_t pre_available = 0;
             uint8_t *dest = BigBuf_malloc(USART_FIFOLEN);
             uint32_t wait = payload->waittime;
+
+            StartTicks();
+
             uint32_t ti = GetTickCount();
+
             while (true) {
                 WaitMS(50);
                 available = usart_rxdata_available();
@@ -2070,12 +2082,15 @@ static void PacketReceived(PacketCommandNG *packet) {
                 if (GetTickCountDelta(ti) > wait)
                     break;
             }
+
             if (available > 0) {
                 uint16_t len = usart_read_ng(dest, available);
                 reply_ng(CMD_USART_TXRX, PM3_SUCCESS, dest, len);
             } else {
                 reply_ng(CMD_USART_TXRX, PM3_ENODATA, NULL, 0);
             }
+
+            StopTicks();
             BigBuf_free();
             LED_B_OFF();
             break;
@@ -2718,9 +2733,6 @@ void  __attribute__((noreturn)) AppMain(void) {
     }
 #endif
 
-#ifdef WITH_FPC_USART
-    usart_init(USART_BAUD_RATE, USART_PARITY);
-#endif
 
 #ifdef WITH_FLASH
     // If flash is not present, BUSY_TIMEOUT kicks in, let's do it after USB
@@ -2733,6 +2745,10 @@ void  __attribute__((noreturn)) AppMain(void) {
     rdv40_spiffs_check();
 #endif
 
+#ifdef WITH_FPC_USART
+    usart_init(USART_BAUD_RATE, USART_PARITY);
+#endif
+
     // This is made as late as possible to ensure enumeration without timeout
     // against device such as http://www.hobbytronics.co.uk/usb-host-board-v2
     // In other words, keep the interval between usb_enable() and the main loop as short as possible.
diff --git a/armsrc/em4x50.c b/armsrc/em4x50.c
index 86d44cd9a..d43a6a15f 100644
--- a/armsrc/em4x50.c
+++ b/armsrc/em4x50.c
@@ -27,6 +27,7 @@
 #include "BigBuf.h"
 #include "spiffs.h"
 #include "appmain.h" // tear
+#include "bruteforce.h"
 
 // Sam7s has several timers, we will use the source TIMER_CLOCK1 (aka AT91C_TC_CLKS_TIMER_DIV1_CLOCK)
 // TIMER_CLOCK1 = MCK/2, MCK is running at 48 MHz, Timer is running at 48/2 = 24 MHz
@@ -632,12 +633,21 @@ static int login(uint32_t password) {
     return PM3_EFAILED;
 }
 
-// searching for password in given range
-static bool brute(uint32_t start, uint32_t stop, uint32_t *pwd) {
+// searching for password using chosen bruteforce algorithm
+static bool brute(em4x50_data_t *etd, uint32_t *pwd) {
+
+    generator_context_t ctx;
     bool pwd_found = false;
+    int generator_ret = 0;
     int cnt = 0;
 
-    for (*pwd = start; *pwd <= stop; (*pwd)++) {
+    bf_generator_init(&ctx, etd->bruteforce_mode);
+
+    if (etd->bruteforce_mode == BRUTEFORCE_MODE_CHARSET)
+        bf_generator_set_charset(&ctx, etd->bruteforce_charset);
+
+    while ((generator_ret = bf_generate32(&ctx)) == GENERATOR_NEXT) {
+        *pwd = ctx.current_key32;
 
         WDT_HIT();
 
@@ -702,7 +712,7 @@ void em4x50_login(uint32_t *password, bool ledcontrol) {
     reply_ng(CMD_LF_EM4X50_LOGIN, status, NULL, 0);
 }
 
-// envoke password search
+// invoke password search
 void em4x50_brute(em4x50_data_t *etd, bool ledcontrol) {
     em4x50_setup_read();
 
@@ -714,7 +724,7 @@ void em4x50_brute(em4x50_data_t *etd, bool ledcontrol) {
             LED_C_OFF();
             LED_D_ON();
         }
-        bsuccess = brute(etd->password1, etd->password2, &pwd);
+        bsuccess = brute(etd, &pwd);
     }
 
     if (ledcontrol) LEDsoff();
diff --git a/armsrc/fpgaloader.c b/armsrc/fpgaloader.c
index 802c77558..6f8dd7a0b 100644
--- a/armsrc/fpgaloader.c
+++ b/armsrc/fpgaloader.c
@@ -393,7 +393,7 @@ static int bitparse_find_section(int bitstream_version, char section_name, uint3
     while (numbytes < MAX_FPGA_BIT_STREAM_HEADER_SEARCH) {
         char current_name = get_from_fpga_stream(bitstream_version, compressed_fpga_stream, output_buffer);
         numbytes++;
-        uint16_t current_length = 0;
+        uint32_t current_length = 0;
         if (current_name < 'a' || current_name > 'e') {
             /* Strange section name, abort */
             break;
@@ -423,7 +423,7 @@ static int bitparse_find_section(int bitstream_version, char section_name, uint3
             break;
         }
 
-        for (uint16_t i = 0; i < current_length && numbytes < MAX_FPGA_BIT_STREAM_HEADER_SEARCH; i++) {
+        for (uint32_t i = 0; i < current_length && numbytes < MAX_FPGA_BIT_STREAM_HEADER_SEARCH; i++) {
             get_from_fpga_stream(bitstream_version, compressed_fpga_stream, output_buffer);
             numbytes++;
         }
diff --git a/armsrc/usart.c b/armsrc/usart.c
index f92e9c701..915d4a445 100644
--- a/armsrc/usart.c
+++ b/armsrc/usart.c
@@ -46,8 +46,8 @@ void usart_close(void) {
 }
 */
 
-static uint8_t us_inbuf1[USART_BUFFLEN];
-static uint8_t us_inbuf2[USART_BUFFLEN];
+static uint8_t us_in_a[USART_BUFFLEN];
+static uint8_t us_in_b[USART_BUFFLEN];
 static uint8_t *usart_cur_inbuf = NULL;
 static uint16_t usart_cur_inbuf_off = 0;
 static uint8_t us_rxfifo[USART_FIFOLEN];
@@ -56,7 +56,9 @@ static size_t us_rxfifo_high = 0;
 
 
 static void usart_fill_rxfifo(void) {
-    uint16_t rxfifo_free ;
+
+    uint16_t rxfifo_free = 0;
+
     if (pUS1->US_RNCR == 0) { // One buffer got filled, backup buffer being used
 
         if (us_rxfifo_low > us_rxfifo_high)
@@ -79,19 +81,22 @@ static void usart_fill_rxfifo(void) {
             pUS1->US_RNCR = USART_BUFFLEN;
 
             // Swap current buff
-            if (usart_cur_inbuf == us_inbuf1)
-                usart_cur_inbuf = us_inbuf2;
+            if (usart_cur_inbuf == us_in_a)
+                usart_cur_inbuf = us_in_b;
             else
-                usart_cur_inbuf = us_inbuf1;
+                usart_cur_inbuf = us_in_a;
 
             usart_cur_inbuf_off = 0;
         } else {
             // Take only what we have room for
             available = rxfifo_free;
             for (uint16_t i = 0; i < available; i++) {
+
                 us_rxfifo[us_rxfifo_high++] = usart_cur_inbuf[usart_cur_inbuf_off + i];
-                if (us_rxfifo_high == sizeof(us_rxfifo))
+
+                if (us_rxfifo_high == sizeof(us_rxfifo)) {
                     us_rxfifo_high = 0;
+                }
             }
             usart_cur_inbuf_off += available;
             return;
@@ -101,18 +106,20 @@ static void usart_fill_rxfifo(void) {
     if (pUS1->US_RCR < USART_BUFFLEN - usart_cur_inbuf_off) { // Current buffer partially filled
 
         if (us_rxfifo_low > us_rxfifo_high)
-            rxfifo_free = us_rxfifo_low - us_rxfifo_high;
+            rxfifo_free = (us_rxfifo_low - us_rxfifo_high);
         else
-            rxfifo_free = sizeof(us_rxfifo) - us_rxfifo_high + us_rxfifo_low;
+            rxfifo_free = (sizeof(us_rxfifo) - us_rxfifo_high + us_rxfifo_low);
 
-        uint16_t available = USART_BUFFLEN - pUS1->US_RCR - usart_cur_inbuf_off;
+        uint16_t available = (USART_BUFFLEN - pUS1->US_RCR - usart_cur_inbuf_off);
 
         if (available > rxfifo_free)
             available = rxfifo_free;
+
         for (uint16_t i = 0; i < available; i++) {
             us_rxfifo[us_rxfifo_high++] = usart_cur_inbuf[usart_cur_inbuf_off + i];
-            if (us_rxfifo_high == sizeof(us_rxfifo))
+            if (us_rxfifo_high == sizeof(us_rxfifo)) {
                 us_rxfifo_high = 0;
+            }
         }
         usart_cur_inbuf_off += available;
     }
@@ -121,9 +128,9 @@ static void usart_fill_rxfifo(void) {
 uint16_t usart_rxdata_available(void) {
     usart_fill_rxfifo();
     if (us_rxfifo_low <= us_rxfifo_high)
-        return us_rxfifo_high - us_rxfifo_low;
+        return (us_rxfifo_high - us_rxfifo_low);
     else
-        return sizeof(us_rxfifo) - us_rxfifo_low + us_rxfifo_high;
+        return (sizeof(us_rxfifo) - us_rxfifo_low + us_rxfifo_high);
 }
 
 uint32_t usart_read_ng(uint8_t *data, size_t len) {
@@ -143,9 +150,10 @@ uint32_t usart_read_ng(uint8_t *data, size_t len) {
     uint32_t maxtry = 10 * (3000000 / USART_BAUD_RATE) + tryconstant;
 
     while (len) {
-        uint32_t available = usart_rxdata_available();
 
+        uint32_t available = usart_rxdata_available();
         uint32_t packetSize = MIN(available, len);
+
         if (available > 0) {
 //            Dbprintf_usb("Dbg USART ask %d bytes, available %d bytes, packetsize %d bytes", len, available, packetSize);
 //            highest_observed_try = MAX(highest_observed_try, try);
@@ -153,8 +161,9 @@ uint32_t usart_read_ng(uint8_t *data, size_t len) {
         }
         len -= packetSize;
         while (packetSize--) {
-            if (us_rxfifo_low == sizeof(us_rxfifo))
+            if (us_rxfifo_low == sizeof(us_rxfifo)) {
                 us_rxfifo_low = 0;
+            }
             data[bytes_rcv++] = us_rxfifo[us_rxfifo_low++];
         }
         if (try++ == maxtry) {
@@ -183,10 +192,13 @@ int usart_writebuffer_sync(uint8_t *data, size_t len) {
 
 void usart_init(uint32_t baudrate, uint8_t parity) {
 
-    if (baudrate != 0)
+    if (baudrate != 0) {
         g_usart_baudrate = baudrate;
-    if ((parity == 'N') || (parity == 'O') || (parity == 'E'))
+    }
+
+    if ((parity == 'N') || (parity == 'O') || (parity == 'E')) {
         g_usart_parity = parity;
+    }
 
     // For a nice detailed sample, interrupt driven but still relevant.
     // See https://www.sparkfun.com/datasheets/DevTools/SAM7/at91sam7%20serial%20communications.pdf
@@ -262,11 +274,11 @@ void usart_init(uint32_t baudrate, uint8_t parity) {
     pUS1->US_TCR = 0;
     pUS1->US_TNPR = (uint32_t)0;
     pUS1->US_TNCR = 0;
-    pUS1->US_RPR = (uint32_t)us_inbuf1;
+    pUS1->US_RPR = (uint32_t)us_in_a;
     pUS1->US_RCR = USART_BUFFLEN;
-    usart_cur_inbuf = us_inbuf1;
+    usart_cur_inbuf = us_in_a;
     usart_cur_inbuf_off = 0;
-    pUS1->US_RNPR = (uint32_t)us_inbuf2;
+    pUS1->US_RNPR = (uint32_t)us_in_b;
     pUS1->US_RNCR = USART_BUFFLEN;
 
     // Initialize our fifo
diff --git a/client/CMakeLists.txt b/client/CMakeLists.txt
index ee1ddcc25..3fd255997 100644
--- a/client/CMakeLists.txt
+++ b/client/CMakeLists.txt
@@ -586,6 +586,17 @@ if (MINGW)
     set(CMAKE_C_FLAGS "-mno-ms-bitfields -fexec-charset=cp850 ${CMAKE_C_FLAGS}")
     set(CMAKE_CXX_FLAGS "-mno-ms-bitfields -fexec-charset=cp850 ${CMAKE_CXX_FLAGS}")
 
+    # GCC 10 has issues with false positives on stringop-overflow, 
+    # let's disable them for now (cf https://gcc.gnu.org/bugzilla/show_bug.cgi?id=92955, https://gcc.gnu.org/bugzilla/show_bug.cgi?id=94335)
+    # beware these flags didn't exist for GCC < 7
+    if(CMAKE_COMPILER_IS_GNUCXX)
+        execute_process(COMMAND ${CMAKE_C_COMPILER} -dumpversion OUTPUT_VARIABLE GCC_VERSION)
+        if (GCC_VERSION VERSION_GREATER 10.0 OR GCC_VERSION VERSION_EQUAL 10.0)
+            set(CMAKE_C_FLAGS "-Wno-stringop-overflow -Wno-error=stringop-overflow ${CMAKE_C_FLAGS}")
+            set(CMAKE_CXX_FLAGS "-Wno-stringop-overflow -Wno-error=stringop-overflow ${CMAKE_CXX_FLAGS}")   
+        endif()
+     endif(CMAKE_COMPILER_IS_GNUCXX)
+
     # link Winsock2
     set(ADDITIONAL_LNK ws2_32 ${ADDITIONAL_LNK})
 endif (MINGW)
diff --git a/client/deps/hardnested/hardnested_bruteforce.c b/client/deps/hardnested/hardnested_bruteforce.c
index b5b36595c..7766b28d3 100644
--- a/client/deps/hardnested/hardnested_bruteforce.c
+++ b/client/deps/hardnested/hardnested_bruteforce.c
@@ -182,7 +182,7 @@ crack_states_thread(void *x) {
             } else {
                 if (!thread_arg->silent) {
                     char progress_text[80];
-                    snprintf(progress_text, sizeof(progress_text), "Brute force phase: %6.02f%%\t", 100.0 * (float)num_keys_tested / (float)(thread_arg->maximum_states));
+                    snprintf(progress_text, sizeof(progress_text), "Brute force phase: %6.02f%%  ", 100.0 * (float)num_keys_tested / (float)(thread_arg->maximum_states));
                     float remaining_bruteforce = thread_arg->nonces[thread_arg->best_first_bytes[0]].expected_num_brute_force - (float)num_keys_tested / 2;
                     hardnested_print_progress(thread_arg->num_acquired_nonces, progress_text, remaining_bruteforce, 5000);
                 }
diff --git a/client/dictionaries/mfc_default_keys.dic b/client/dictionaries/mfc_default_keys.dic
index 7ae6ead7f..63598f78b 100644
--- a/client/dictionaries/mfc_default_keys.dic
+++ b/client/dictionaries/mfc_default_keys.dic
@@ -18,6 +18,19 @@ A5A4A3A2A1A0
 # MAD access key B
 89ECA97F8C2A
 #
+# Mifare 1k EV1 (S50) hidden blocks, Signature data
+# 16 A
+5C8FF9990DA2
+#
+# 17 A
+75CCB59C9BED
+#
+# 16 B
+D01AFEEB890A
+#
+# 17 B
+4B791BEA7BCC
+#
 #
 B0B1B2B3B4B5
 C0C1C2C3C4C5
@@ -111,7 +124,7 @@ F1D83F964314
 # Access control system
 605F5E5D5C5B
 #
-#NSP Global keys A and B (uk housing access control)
+# NSP Global keys A and B (uk housing access control)
 199404281970
 199404281998
 #
@@ -263,16 +276,25 @@ E3429281EFC1
 460722122510
 #
 # 3dprinter
-# EPI Envisionte# 3dprinter
+# EPI Envisionte
 AAFB06045877
 #
 # gym
+#
 # Fysiken A
 3E65E4FB65B3
 #
 # Fysiken B
 25094DF6F148
 #
+#
+# https://mattionline.de/fitnessstudio-armband-reverse-engineering/ 
+# https://mattionline.de/milazycracker/
+# gym wistband A, same as Fysiken A
+# gym wistband B
+81CC25EBBB6A
+195DC63DB3A3
+#
 # CleverFit
 A05DBD98E0FC
 #
@@ -280,6 +302,10 @@ A05DBD98E0FC
 AA4DDA458EBB 
 EAB8066C7479
 #
+# Nordic Wellness A, same as Fysiken A
+# Nordic Wellness B
+E5519E1CC92B
+#
 # Hotel KeyCard
 D3B595E9DD63
 AFBECD121004
@@ -626,19 +652,6 @@ A8844B0BCA06
 564C505F4D41
 BA5B895DA162
 #
-# Vigik mystery Keys Mifare 1k EV1 (S50)
-# 16 A
-5C8FF9990DA2
-#
-# 17 A
-75CCB59C9BED
-#
-# 16 B
-D01AFEEB890A
-#
-# 17 B
-4B791BEA7BCC
-#
 # BTCINO UNDETERMINED SPREAKD 0x01->0x13 key
 021209197591
 #
diff --git a/client/experimental_lib/CMakeLists.txt b/client/experimental_lib/CMakeLists.txt
index bdc122e58..2ac10f871 100644
--- a/client/experimental_lib/CMakeLists.txt
+++ b/client/experimental_lib/CMakeLists.txt
@@ -585,6 +585,18 @@ if (MINGW)
 
     set(CMAKE_C_FLAGS "-mno-ms-bitfields -fexec-charset=cp850 ${CMAKE_C_FLAGS}")
     set(CMAKE_CXX_FLAGS "-mno-ms-bitfields -fexec-charset=cp850 ${CMAKE_CXX_FLAGS}")
+
+    # GCC 10 has issues with false positives on stringop-overflow, 
+    # let's disable them for now (cf https://gcc.gnu.org/bugzilla/show_bug.cgi?id=92955, https://gcc.gnu.org/bugzilla/show_bug.cgi?id=94335)
+    # beware these flags didn't exist for GCC < 7
+    if(CMAKE_COMPILER_IS_GNUCXX)
+        execute_process(COMMAND ${CMAKE_C_COMPILER} -dumpversion OUTPUT_VARIABLE GCC_VERSION)
+        if (GCC_VERSION VERSION_GREATER 10.0 OR GCC_VERSION VERSION_EQUAL 10.0)
+            set(CMAKE_C_FLAGS "-Wno-stringop-overflow -Wno-error=stringop-overflow ${CMAKE_C_FLAGS}")
+            set(CMAKE_CXX_FLAGS "-Wno-stringop-overflow -Wno-error=stringop-overflow ${CMAKE_CXX_FLAGS}")   
+        endif()
+    endif(CMAKE_COMPILER_IS_GNUCXX)
+
 endif (MINGW)
 
 target_include_directories(pm3rrg_rdv4 PRIVATE
diff --git a/client/resources/aid_desfire.json b/client/resources/aid_desfire.json
index 45df737e5..f5387ff45 100644
--- a/client/resources/aid_desfire.json
+++ b/client/resources/aid_desfire.json
@@ -367,5 +367,21 @@
         "Name": "University of Ljubljana Student ID",
         "Description": "",
         "Type": "student"
+    },
+    {
+        "AID": "27E178",
+        "Vendor": "Disney",
+        "Country": "US",
+        "Name": "Disney MagicBand",
+        "Description": "",
+        "Type": "payment system"
+    },
+    {
+        "AID": "44434C",
+        "Vendor": "Disney",
+        "Country": "US",
+        "Name": "Disney MagicBand",
+        "Description": "AID found on MagicBand desfire cards",
+        "Type": "payment system"
     }
 ]
diff --git a/client/src/cmdflashmemspiffs.c b/client/src/cmdflashmemspiffs.c
index a1923d588..e84b3e597 100644
--- a/client/src/cmdflashmemspiffs.c
+++ b/client/src/cmdflashmemspiffs.c
@@ -531,7 +531,7 @@ static int CmdFlashMemSpiFFSView(const char *Cmd) {
     void *argtable[] = {
         arg_param_begin,
         arg_str1("f", "file", "<fn>", "SPIFFS file to view"),
-        arg_int0("c", "cols", "<dec>", "column breaks (def 32)"),
+        arg_int0("c", "cols", "<dec>", "column breaks (def 16)"),
         arg_param_end
     };
     CLIExecWithReturn(ctx, Cmd, argtable, false);
@@ -540,7 +540,7 @@ static int CmdFlashMemSpiFFSView(const char *Cmd) {
     char fn[32] = {0};
     CLIParamStrToBuf(arg_get_str(ctx, 1), (uint8_t *)fn, 32, &fnlen);
 
-    int breaks = arg_get_int_def(ctx, 2, 32);
+    int breaks = arg_get_int_def(ctx, 2, 16);
     CLIParserFree(ctx);
 
     uint8_t *dump = NULL;
diff --git a/client/src/cmdhfmf.c b/client/src/cmdhfmf.c
index 17ad30184..3dee09d3b 100644
--- a/client/src/cmdhfmf.c
+++ b/client/src/cmdhfmf.c
@@ -308,7 +308,6 @@ static int mf_print_keys(uint16_t n, uint8_t *d) {
     }
 
     for (uint16_t i = 0; i < n; i++) {
-
         if (mfIsSectorTrailer(i)) {
             e_sector[mfSectorNum(i)].foundKey[0] = 1;
             e_sector[mfSectorNum(i)].Key[0] = bytes_to_num(d + (i * MFBLOCK_SIZE), MIFARE_KEY_SIZE);
@@ -321,6 +320,52 @@ static int mf_print_keys(uint16_t n, uint8_t *d) {
     return PM3_SUCCESS;
 }
 
+// MFC dump ,  extract and save the keys to key file
+static int mf_save_keys_from_arr(uint16_t n, uint8_t *d) {
+    uint8_t sectors = 0;
+    switch (n) {
+        case MIFARE_MINI_MAXBLOCK:
+            sectors = MIFARE_MINI_MAXSECTOR;
+            break;
+        case MIFARE_2K_MAXBLOCK:
+            sectors = MIFARE_2K_MAXSECTOR;
+            break;
+        case MIFARE_4K_MAXBLOCK:
+            sectors = MIFARE_4K_MAXSECTOR;
+            break;
+        case MIFARE_1K_MAXBLOCK:
+        default:
+            sectors = MIFARE_1K_MAXSECTOR;
+            break;
+    }
+
+    uint16_t keysize = 2 * MIFARE_KEY_SIZE * sectors;
+
+    uint8_t *keys = calloc(keysize, sizeof(uint8_t));
+    if (keys == NULL) {
+        return PM3_EMALLOC;
+    }
+
+    uint8_t sector = 0;
+    for (uint16_t i = 0; i < n; i++) {
+        if (mfIsSectorTrailer(i)) {
+            // key A offset in ST block
+            memcpy(keys + (MIFARE_KEY_SIZE * sector), d + (i * MFBLOCK_SIZE), MIFARE_KEY_SIZE);
+
+            // key B offset in ST block
+            memcpy(keys + (MIFARE_KEY_SIZE * sectors) + (MIFARE_KEY_SIZE * sector), d + (i * MFBLOCK_SIZE) + 10, MIFARE_KEY_SIZE);
+
+            sector++;
+        }
+    }
+
+    char fn[FILE_PATH_SIZE] = {0};
+    snprintf(fn, sizeof(fn), "hf-mf-%s-keys", sprint_hex_inrow(d, 4));
+    saveFile(fn, ".bin", keys, keysize);
+    free(keys);
+    return PM3_SUCCESS;
+}
+
 /*
 static void mf_print_values(uint16_t n, uint8_t *d) {
 
@@ -1211,52 +1256,41 @@ static int CmdHF14AMfRestore(const char *Cmd) {
         free(fptr);
     }
 
-    FILE *f;
-    if ((f = fopen(keyfilename, "rb")) == NULL) {
-        PrintAndLogEx(WARNING, "Could not find file " _YELLOW_("%s"), keyfilename);
-        return PM3_EFILE;
-    }
-
-    // key arrays
-    uint8_t keyA[40][6];
-    uint8_t keyB[40][6];
-
-    // read key file
-    size_t bytes_read;
-    for (uint8_t s = 0; s < sectors; s++) {
-        bytes_read = fread(keyA[s], 1, 6, f);
-        if (bytes_read != 6) {
-            PrintAndLogEx(ERR, "File reading error  " _YELLOW_("%s"), keyfilename);
-            fclose(f);
-            return PM3_EFILE;
+    //
+    size_t alen = 0, blen = 0;
+    uint8_t *keyA, *keyB;
+    if (loadFileBinaryKey(keyfilename, "", (void **)&keyA, (void **)&keyB, &alen, &blen) != PM3_SUCCESS) {
+        if (keyA) {
+            free(keyA);
         }
+        return PM3_ESOFT;
     }
 
-    for (uint8_t s = 0; s < sectors; s++) {
-        bytes_read = fread(keyB[s], 1, 6, f);
-        if (bytes_read != 6) {
-            PrintAndLogEx(ERR, "File reading error " _YELLOW_("%s"), keyfilename);
-            fclose(f);
-            return PM3_EFILE;
-        }
-    }
-    fclose(f);
+    PrintAndLogEx(INFO, "Using `" _YELLOW_("%s") "`", keyfilename);
 
     // try reading card uid and create filename
     if (datafnlen == 0) {
         char *fptr = GenerateFilename("hf-mf-", "-dump.bin");
-        if (fptr == NULL)
+        if (fptr == NULL) {
+            if (keyA) {
+                free(keyA);
+            }
+            if (keyB) {
+                free(keyB);
+            }
             return PM3_ESOFT;
-
+        }
         strcpy(datafilename, fptr);
         free(fptr);
     }
 
     // read dump file
     uint8_t *dump = NULL;
-    bytes_read = 0;
+    size_t bytes_read = 0;
     int res = pm3_load_dump(datafilename, (void **)&dump, &bytes_read, (MFBLOCK_SIZE * MIFARE_4K_MAXBLOCK));
     if (res != PM3_SUCCESS) {
+        free(keyA);
+        free(keyB);
         return res;
     }
 
@@ -1281,19 +1315,10 @@ static int CmdHF14AMfRestore(const char *Cmd) {
             if (mfNumBlocksPerSector(s) - 1 == b) {
                 if (use_keyfile_for_auth == false) {
                     // replace KEY A
-                    bldata[0]  = (keyA[s][0]);
-                    bldata[1]  = (keyA[s][1]);
-                    bldata[2]  = (keyA[s][2]);
-                    bldata[3]  = (keyA[s][3]);
-                    bldata[4]  = (keyA[s][4]);
-                    bldata[5]  = (keyA[s][5]);
+                    memcpy(bldata, keyA + (s * MIFARE_KEY_SIZE), MIFARE_KEY_SIZE);
+
                     // replace KEY B
-                    bldata[10] = (keyB[s][0]);
-                    bldata[11] = (keyB[s][1]);
-                    bldata[12] = (keyB[s][2]);
-                    bldata[13] = (keyB[s][3]);
-                    bldata[14] = (keyB[s][4]);
-                    bldata[15] = (keyB[s][5]);
+                    memcpy(bldata + 10, keyB + (s * MIFARE_KEY_SIZE), MIFARE_KEY_SIZE);
                 }
 
                 // ensure access right isn't messed up.
@@ -1327,12 +1352,12 @@ static int CmdHF14AMfRestore(const char *Cmd) {
             for (int8_t kt = MF_KEY_B; kt > -1; kt--) {
                 if (use_keyfile_for_auth) {
                     if (kt == MF_KEY_A)
-                        memcpy(wdata, keyA[s], 6);
+                        memcpy(wdata, keyA + (s * MIFARE_KEY_SIZE), MIFARE_KEY_SIZE);
                     else
-                        memcpy(wdata, keyB[s], 6);
+                        memcpy(wdata, keyB + (s * MIFARE_KEY_SIZE), MIFARE_KEY_SIZE);
                 } else {
                     // use default key to authenticate for the write command
-                    memcpy(wdata, default_key, 6);
+                    memcpy(wdata, default_key, MIFARE_KEY_SIZE);
                 }
                 PrintAndLogEx(INFO, "block %3d: %s", mfFirstBlockOfSector(s) + b, sprint_hex(bldata, sizeof(bldata)));
 
@@ -1359,6 +1384,8 @@ static int CmdHF14AMfRestore(const char *Cmd) {
     } // end loop S
 
     free(ref_dump);
+    free(keyA);
+    free(keyB);
     PrintAndLogEx(INFO, "Done!");
     return PM3_SUCCESS;
 }
@@ -2155,26 +2182,27 @@ static int CmdHF14AMfNestedHard(const char *Cmd) {
 
     uint64_t foundkey = 0;
     int16_t isOK = mfnestedhard(blockno, keytype, key, trg_blockno, trg_keytype, known_target_key ? trg_key : NULL, nonce_file_read, nonce_file_write, slow, tests, &foundkey, filename);
+    switch (isOK) {
+        case PM3_ETIMEOUT :
+            PrintAndLogEx(ERR, "Error: No response from Proxmark3\n");
+            break;
+        case PM3_EOPABORTED:
+            PrintAndLogEx(WARNING, "Button pressed. Aborted\n");
+            break;
+        case PM3_ESTATIC_NONCE:
+            PrintAndLogEx(ERR, "Error: Static encrypted nonce detected. Aborted\n");
+            break;
+        case PM3_EFAILED: {
+            PrintAndLogEx(FAILED, "\nFailed to recover a key...");
+            break;
+        }
+        default :
+            break;
+    }
 
     if ((tests == 0) && IfPm3Iso14443a()) {
         DropField();
     }
-
-    if (isOK) {
-        switch (isOK) {
-            case PM3_ETIMEOUT :
-                PrintAndLogEx(ERR, "Error: No response from Proxmark3\n");
-                break;
-            case PM3_EOPABORTED:
-                PrintAndLogEx(WARNING, "Button pressed. Aborted\n");
-                break;
-            case PM3_ESTATIC_NONCE:
-                PrintAndLogEx(ERR, "Error: Static encrypted nonce detected. Aborted\n");
-                break;
-            default :
-                break;
-        }
-    }
     return isOK;
 }
 
@@ -2389,14 +2417,6 @@ static int CmdHF14AMfAutoPWN(const char *Cmd) {
 
     if (is_ev1) {
         PrintAndLogEx(INFO, "MIFARE Classic EV1 card detected");
-        // Store the keys
-        e_sector[16].Key[MF_KEY_A] = bytes_to_num((uint8_t *)g_mifare_signature_key_a, sizeof(g_mifare_signature_key_a));
-        e_sector[16].foundKey[MF_KEY_A] = 'D';
-
-        e_sector[17].Key[MF_KEY_A] = bytes_to_num((uint8_t *)g_mifare_signature_key_a, sizeof(g_mifare_signature_key_a));
-        e_sector[17].foundKey[MF_KEY_A] = 'D';
-        e_sector[17].Key[MF_KEY_B] = bytes_to_num((uint8_t *)g_mifare_signature_key_b, sizeof(g_mifare_signature_key_b));
-        e_sector[17].foundKey[MF_KEY_B] = 'D';
 
         // use found key if not supplied
         if (known_key == false) {
@@ -2431,7 +2451,7 @@ static int CmdHF14AMfAutoPWN(const char *Cmd) {
         PrintAndLogEx(INFO, " key supplied .. " _YELLOW_("%s"), known_key ? "True" : "False");
         PrintAndLogEx(INFO, " known sector .. " _YELLOW_("%d"), sectorno);
         PrintAndLogEx(INFO, " keytype ....... " _YELLOW_("%c"), (keytype == MF_KEY_B) ? 'B' : 'A');
-        PrintAndLogEx(INFO, " known key ..... " _YELLOW_("%s"), sprint_hex(key, sizeof(key)));
+        PrintAndLogEx(INFO, " known key ..... " _YELLOW_("%s"), sprint_hex_inrow(key, sizeof(key)));
 
         if (has_staticnonce == NONCE_STATIC)
             PrintAndLogEx(INFO, " card PRNG ..... " _YELLOW_("STATIC"));
@@ -2458,10 +2478,10 @@ static int CmdHF14AMfAutoPWN(const char *Cmd) {
         }
 
         if (mfCheckKeys(mfFirstBlockOfSector(sectorno), keytype, true, 1, key, &key64) == PM3_SUCCESS) {
-            PrintAndLogEx(INFO, "target sector %3u key type %c -- using valid key [ " _GREEN_("%s") "] (used for nested / hardnested attack)",
+            PrintAndLogEx(INFO, "target sector %3u key type %c -- using valid key [ " _GREEN_("%s") " ] (used for nested / hardnested attack)",
                           sectorno,
                           (keytype == MF_KEY_B) ? 'B' : 'A',
-                          sprint_hex(key, sizeof(key))
+                          sprint_hex_inrow(key, sizeof(key))
                          );
 
             // Store the key for the nested / hardnested attack (if supplied by the user)
@@ -2474,7 +2494,7 @@ static int CmdHF14AMfAutoPWN(const char *Cmd) {
             PrintAndLogEx(FAILED, "Key is wrong. Can't authenticate to sector"_RED_("%3d") " key type "_RED_("%c") " key " _RED_("%s"),
                           sectorno,
                           (keytype == MF_KEY_B) ? 'B' : 'A',
-                          sprint_hex(key, sizeof(key))
+                          sprint_hex_inrow(key, sizeof(key))
                          );
             PrintAndLogEx(WARNING, "falling back to dictionary");
         }
@@ -2482,31 +2502,34 @@ static int CmdHF14AMfAutoPWN(const char *Cmd) {
         // Check if the user supplied key is used by other sectors
         for (int i = 0; i < sector_cnt; i++) {
             for (int j = MF_KEY_A; j <= MF_KEY_B; j++) {
-                if (e_sector[i].foundKey[j] == 0) {
-                    if (mfCheckKeys(mfFirstBlockOfSector(i), j, true, 1, key, &key64) == PM3_SUCCESS) {
-                        e_sector[i].Key[j] = bytes_to_num(key, 6);
-                        e_sector[i].foundKey[j] = 'U';
 
-                        // If the user supplied secctor / keytype was wrong --> just be nice and correct it ;)
-                        if (known_key == false) {
-                            num_to_bytes(e_sector[i].Key[j], 6, key);
-                            known_key = true;
-                            sectorno = i;
-                            keytype = j;
-                            PrintAndLogEx(SUCCESS, "target sector %3u key type %c -- found valid key [ " _GREEN_("%s") " ] (used for nested / hardnested attack)",
-                                          i,
-                                          (j == MF_KEY_B) ? 'B' : 'A',
-                                          sprint_hex_inrow(key, sizeof(key))
-                                         );
-                        } else {
-                            PrintAndLogEx(SUCCESS, "target sector %3u key type %c -- found valid key [ " _GREEN_("%s") " ]",
-                                          i,
-                                          (j == MF_KEY_B)  ? 'B' : 'A',
-                                          sprint_hex_inrow(key, sizeof(key))
-                                         );
-                        }
-                        ++num_found_keys;
+                if (e_sector[i].foundKey[j]) {
+                    continue;
+                }
+
+                if (mfCheckKeys(mfFirstBlockOfSector(i), j, true, 1, key, &key64) == PM3_SUCCESS) {
+                    e_sector[i].Key[j] = bytes_to_num(key, 6);
+                    e_sector[i].foundKey[j] = 'U';
+
+                    // If the user supplied secctor / keytype was wrong --> just be nice and correct it ;)
+                    if (known_key == false) {
+                        num_to_bytes(e_sector[i].Key[j], 6, key);
+                        known_key = true;
+                        sectorno = i;
+                        keytype = j;
+                        PrintAndLogEx(SUCCESS, "target sector %3u key type %c -- found valid key [ " _GREEN_("%s") " ] (used for nested / hardnested attack)",
+                                      i,
+                                      (j == MF_KEY_B) ? 'B' : 'A',
+                                      sprint_hex_inrow(key, sizeof(key))
+                                     );
+                    } else {
+                        PrintAndLogEx(SUCCESS, "target sector %3u key type %c -- found valid key [ " _GREEN_("%s") " ]",
+                                      i,
+                                      (j == MF_KEY_B)  ? 'B' : 'A',
+                                      sprint_hex_inrow(key, sizeof(key))
+                                     );
                     }
+                    ++num_found_keys;
                 }
             }
         }
@@ -2551,7 +2574,7 @@ static int CmdHF14AMfAutoPWN(const char *Cmd) {
         PrintAndLogEx(INFO, "." NOLF);
         // Check all the sectors
         for (int i = 0; i < sector_cnt; i++) {
-            for (int j = 0; j < 2; j++) {
+            for (int j = MF_KEY_A; j <= MF_KEY_B; j++) {
                 // Check if the key is known
                 if (e_sector[i].foundKey[j] == 0) {
                     for (uint32_t k = 0; k < key_cnt; k++) {
@@ -2608,28 +2631,30 @@ static int CmdHF14AMfAutoPWN(const char *Cmd) {
     // Analyse the dictionary attack
     for (int i = 0; i < sector_cnt; i++) {
         for (int j = MF_KEY_A; j <= MF_KEY_B; j++) {
-            if (e_sector[i].foundKey[j] == 1) {
-                e_sector[i].foundKey[j] = 'D';
-                num_to_bytes(e_sector[i].Key[j], 6, tmp_key);
+            if (e_sector[i].foundKey[j] != 1) {
+                continue;
+            }
 
-                // Store valid credentials for the nested / hardnested attack if none exist
-                if (known_key == false) {
-                    num_to_bytes(e_sector[i].Key[j], 6, key);
-                    known_key = true;
-                    sectorno = i;
-                    keytype = j;
-                    PrintAndLogEx(SUCCESS, "target sector %3u key type %c -- found valid key [ " _GREEN_("%s") " ] (used for nested / hardnested attack)",
-                                  i,
-                                  (j == MF_KEY_B) ? 'B' : 'A',
-                                  sprint_hex_inrow(tmp_key, sizeof(tmp_key))
-                                 );
-                } else {
-                    PrintAndLogEx(SUCCESS, "target sector %3u key type %c -- found valid key [ " _GREEN_("%s") " ]",
-                                  i,
-                                  (j == MF_KEY_B) ? 'B' : 'A',
-                                  sprint_hex_inrow(tmp_key, sizeof(tmp_key))
-                                 );
-                }
+            e_sector[i].foundKey[j] = 'D';
+            num_to_bytes(e_sector[i].Key[j], 6, tmp_key);
+
+            // Store valid credentials for the nested / hardnested attack if none exist
+            if (known_key == false) {
+                num_to_bytes(e_sector[i].Key[j], 6, key);
+                known_key = true;
+                sectorno = i;
+                keytype = j;
+                PrintAndLogEx(SUCCESS, "target sector %3u key type %c -- found valid key [ " _GREEN_("%s") " ] (used for nested / hardnested attack)",
+                              i,
+                              (j == MF_KEY_B) ? 'B' : 'A',
+                              sprint_hex_inrow(tmp_key, sizeof(tmp_key))
+                             );
+            } else {
+                PrintAndLogEx(SUCCESS, "target sector %3u key type %c -- found valid key [ " _GREEN_("%s") " ]",
+                              i,
+                              (j == MF_KEY_B) ? 'B' : 'A',
+                              sprint_hex_inrow(tmp_key, sizeof(tmp_key))
+                             );
             }
         }
     }
@@ -2690,7 +2715,8 @@ noValidKeyFound:
 
     // Iterate over each sector and key(A/B)
     for (current_sector_i = 0; current_sector_i < sector_cnt; current_sector_i++) {
-        for (current_key_type_i = 0; current_key_type_i < 2; current_key_type_i++) {
+
+        for (current_key_type_i = MF_KEY_A; current_key_type_i <= MF_KEY_B; current_key_type_i++) {
 
             // If the key is already known, just skip it
             if (e_sector[current_sector_i].foundKey[current_key_type_i] == 0) {
@@ -2863,7 +2889,7 @@ tryHardnested: // If the nested attack fails then we try the hardnested attack
                         foundkey = 0;
                         isOK = mfnestedhard(mfFirstBlockOfSector(sectorno), keytype, key, mfFirstBlockOfSector(current_sector_i), current_key_type_i, NULL, false, false, slow, 0, &foundkey, NULL);
                         DropField();
-                        if (isOK) {
+                        if (isOK != PM3_SUCCESS) {
                             switch (isOK) {
                                 case PM3_ETIMEOUT: {
                                     PrintAndLogEx(ERR, "\nError: No response from Proxmark3");
@@ -2886,6 +2912,10 @@ tryHardnested: // If the nested attack fails then we try the hardnested attack
                                     PrintAndLogEx(NORMAL, "");
                                     break;
                                 }
+                                case PM3_EFAILED: {
+                                    PrintAndLogEx(FAILED, "\nFailed to recover a key...");
+                                    continue;
+                                }
                                 default: {
                                     break;
                                 }
@@ -4394,6 +4424,7 @@ static int CmdHF14AMfEView(const char *Cmd) {
         arg_lit0(NULL, "2k", "MIFARE Classic/Plus 2k"),
         arg_lit0(NULL, "4k", "MIFARE Classic 4k / S70"),
         arg_lit0("v", "verbose", "verbose output"),
+        arg_lit0(NULL, "sk", "Save extracted keys to file"),
         arg_param_end
     };
     CLIExecWithReturn(ctx, Cmd, argtable, true);
@@ -4402,6 +4433,7 @@ static int CmdHF14AMfEView(const char *Cmd) {
     bool m2 = arg_get_lit(ctx, 3);
     bool m4 = arg_get_lit(ctx, 4);
     bool verbose = arg_get_lit(ctx, 5);
+    bool save_keys = arg_get_lit(ctx, 6);
     CLIParserFree(ctx);
 
     // validations
@@ -4447,6 +4479,11 @@ static int CmdHF14AMfEView(const char *Cmd) {
     if (verbose) {
         mf_print_keys(block_cnt, dump);
     }
+
+    if (save_keys) {
+        mf_save_keys_from_arr(block_cnt, dump);
+    }
+
     free(dump);
     return PM3_SUCCESS;
 }
@@ -5864,8 +5901,9 @@ int CmdHFMFNDEFRead(const char *Cmd) {
     CLIParserFree(ctx);
 
     uint16_t ndef_aid = NDEF_MFC_AID;
-    if (aidlen == 2)
+    if (aidlen == 2) {
         ndef_aid = (aid[0] << 8) + aid[1];
+    }
 
     uint8_t ndefkey[6] = {0};
     memcpy(ndefkey, g_mifare_ndef_key, 6);
@@ -6079,39 +6117,27 @@ int CmdHFMFNDEFFormat(const char *Cmd) {
         DropField();
     }
 
+
     // load key file if exist
     if (strlen(keyFilename)) {
-
-        FILE *f;
-        if ((f = fopen(keyFilename, "rb")) == NULL) {
-            // PrintAndLogEx(WARNING, "Could not find file " _YELLOW_("%s"), keyFilename);
+        //
+        size_t alen = 0, blen = 0;
+        uint8_t *tmpA, *tmpB;
+        if (loadFileBinaryKey(keyFilename, "", (void **)&tmpA, (void **)&tmpB, &alen, &blen) != PM3_SUCCESS) {
+            if (tmpA) {
+                free(tmpA);
+            }
             goto skipfile;
         }
 
         PrintAndLogEx(INFO, "Using `" _YELLOW_("%s") "`", keyFilename);
 
-        // Read keys A from file
-        size_t bytes_read;
-        for (uint8_t i = 0; i < numSectors; i++) {
-            bytes_read = fread(keyA[i], 1, MFKEY_SIZE, f);
-            if (bytes_read != MFKEY_SIZE) {
-                PrintAndLogEx(ERR, "File reading error.");
-                fclose(f);
-                return PM3_EFILE;
-            }
+        for (int i = 0; i < numSectors; i++) {
+            memcpy(keyA[i], tmpA + (i * MIFARE_KEY_SIZE), MIFARE_KEY_SIZE);
+            memcpy(keyB[i], tmpB + (i * MIFARE_KEY_SIZE), MIFARE_KEY_SIZE);
         }
-
-        // Read keys B from file
-        for (uint8_t i = 0; i < numSectors; i++) {
-            bytes_read = fread(keyB[i], 1, MFKEY_SIZE, f);
-            if (bytes_read != MFKEY_SIZE) {
-                PrintAndLogEx(ERR, "File reading error.");
-                fclose(f);
-                return PM3_EFILE;
-            }
-        }
-
-        fclose(f);
+        free(tmpA);
+        free(tmpB);
     }
 
 skipfile:
@@ -6154,7 +6180,6 @@ skipfile:
                     }
                     break;
                 }
-
             }
 
             // write to card,  try B key first
@@ -6169,7 +6194,6 @@ skipfile:
     }
 
     PrintAndLogEx(NORMAL, "");
-
     return PM3_SUCCESS;
 }
 
@@ -6952,6 +6976,7 @@ static int CmdHF14AMfWipe(const char *Cmd) {
         PrintAndLogEx(INFO, "Forcing overwrite of sector 0 / block 0 ");
     else
         PrintAndLogEx(INFO, "Skipping sector 0 / block 0");
+
     PrintAndLogEx(NORMAL, "");
 
     uint8_t zeros[MFBLOCK_SIZE] = {0};
@@ -6963,7 +6988,12 @@ static int CmdHF14AMfWipe(const char *Cmd) {
 
         for (uint8_t b = 0; b < mfNumBlocksPerSector(s); b++) {
 
-            // Skipp write to manufacture block if not enforced
+            if (kbd_enter_pressed()) {
+                PrintAndLogEx(WARNING, "\naborted via keyboard!\n");
+                goto out;
+            }
+
+            // Skip write to manufacture block if not enforced
             if (s == 0 && b == 0 && gen2 == false) {
                 continue;
             }
@@ -7026,6 +7056,7 @@ static int CmdHF14AMfView(const char *Cmd) {
         arg_param_begin,
         arg_str1("f", "file", "<fn>", "filename of dump"),
         arg_lit0("v", "verbose", "verbose output"),
+        arg_lit0(NULL, "sk", "Save extracted keys to file"),
         arg_param_end
     };
     CLIExecWithReturn(ctx, Cmd, argtable, false);
@@ -7033,6 +7064,7 @@ static int CmdHF14AMfView(const char *Cmd) {
     char filename[FILE_PATH_SIZE];
     CLIParamStrToBuf(arg_get_str(ctx, 1), (uint8_t *)filename, FILE_PATH_SIZE, &fnlen);
     bool verbose = arg_get_lit(ctx, 2);
+    bool save_keys = arg_get_lit(ctx, 3);
     CLIParserFree(ctx);
 
     // read dump file
@@ -7063,6 +7095,10 @@ static int CmdHF14AMfView(const char *Cmd) {
         mf_analyse_acl(block_cnt, dump);
     }
 
+    if (save_keys) {
+        mf_save_keys_from_arr(block_cnt, dump);
+    }
+
     int sector = DetectHID(dump, 0x4910);
     if (sector > -1) {
         // decode it
diff --git a/client/src/cmdhfmfhard.c b/client/src/cmdhfmfhard.c
index 4cb7873af..c885e41c9 100644
--- a/client/src/cmdhfmfhard.c
+++ b/client/src/cmdhfmfhard.c
@@ -34,7 +34,6 @@
 
 #include "commonutil.h"  // ARRAYLEN
 #include "comms.h"
-
 #include "proxmark3.h"
 #include "ui.h"
 #include "util_posix.h"
@@ -48,7 +47,8 @@
 #define NUM_CHECK_BITFLIPS_THREADS      (num_CPUs())
 #define NUM_REDUCTION_WORKING_THREADS   (num_CPUs())
 
-#define IGNORE_BITFLIP_THRESHOLD        0.99 // ignore bitflip arrays which have nearly only valid states
+// ignore bitflip arrays which have nearly only valid states
+#define IGNORE_BITFLIP_THRESHOLD        0.9901
 
 #define STATE_FILES_DIRECTORY           "hardnested_tables/"
 #define STATE_FILE_TEMPLATE             "bitflip_%d_%03" PRIx16 "_states.bin.bz2"
@@ -57,7 +57,11 @@
 // #define DEBUG_REDUCTION
 
 // possible sum property values
-static uint16_t sums[NUM_SUMS] = {0, 32, 56, 64, 80, 96, 104, 112, 120, 128, 136, 144, 152, 160, 176, 192, 200, 224, 256};
+static uint16_t sums[NUM_SUMS] = {
+    0,   32,  56,  64,  80,  96,  104, 112,
+    120, 128, 136, 144, 152, 160, 176, 192,
+    200, 224, 256
+};
 
 // number of possible partial sum property values
 #define NUM_PART_SUMS                  9
@@ -505,8 +509,11 @@ static void free_sum_bitarrays(void) {
 static char failstr[250] = "";
 #endif
 
-static const float p_K0[NUM_SUMS] = { // the probability that a random nonce has a Sum Property K
-    0.0290, 0.0083, 0.0006, 0.0339, 0.0048, 0.0934, 0.0119, 0.0489, 0.0602, 0.4180, 0.0602, 0.0489, 0.0119, 0.0934, 0.0048, 0.0339, 0.0006, 0.0083, 0.0290
+// the probability that a random nonce has a Sum Property K
+static const float p_K0[NUM_SUMS] = {
+    0.0290, 0.0083, 0.0006, 0.0339, 0.0048, 0.0934, 0.0119, 0.0489,
+    0.0602, 0.4180, 0.0602, 0.0489, 0.0119, 0.0934, 0.0048, 0.0339,
+    0.0006, 0.0083, 0.0290
 };
 static float my_p_K[NUM_SUMS];
 static const float *p_K;
@@ -1275,6 +1282,7 @@ static void apply_sum_a0(void) {
 }
 
 static void simulate_MFplus_RNG(uint32_t test_cuid, uint64_t test_key, uint32_t *nt_enc, uint8_t *par_enc) {
+
     struct Crypto1State sim_cs = {0, 0};
 
     // init cryptostate with key:
@@ -1285,12 +1293,20 @@ static void simulate_MFplus_RNG(uint32_t test_cuid, uint64_t test_key, uint32_t
 
     *par_enc = 0;
     uint32_t nt = (rand() & 0xff) << 24 | (rand() & 0xff) << 16 | (rand() & 0xff) << 8 | (rand() & 0xff);
+
     for (int8_t byte_pos = 3; byte_pos >= 0; byte_pos--) {
+
         uint8_t nt_byte_dec = (nt >> (8 * byte_pos)) & 0xff;
-        uint8_t nt_byte_enc = crypto1_byte(&sim_cs, nt_byte_dec ^ (test_cuid >> (8 * byte_pos)), false) ^ nt_byte_dec; // encode the nonce byte
+
+        // encode the nonce byte
+        uint8_t nt_byte_enc = crypto1_byte(&sim_cs, nt_byte_dec ^ (test_cuid >> (8 * byte_pos)), false) ^ nt_byte_dec;
         *nt_enc = (*nt_enc << 8) | nt_byte_enc;
-        uint8_t ks_par = filter(sim_cs.odd);                         // the keystream bit to encode/decode the parity bit
-        uint8_t nt_byte_par_enc = ks_par ^ oddparity8(nt_byte_dec);  // determine the nt byte's parity and encode it
+
+        // the keystream bit to encode/decode the parity bit
+        uint8_t ks_par = filter(sim_cs.odd);
+
+        // determine the nt byte's parity and encode it
+        uint8_t nt_byte_par_enc = ks_par ^ oddparity8(nt_byte_dec);
         *par_enc = (*par_enc << 1) | nt_byte_par_enc;
     }
 }
@@ -2460,6 +2476,9 @@ int mfnestedhard(uint8_t blockNo, uint8_t keyType, uint8_t *key, uint8_t trgBloc
         free_bitarray(all_bitflips_bitarray[EVEN_STATE]);
         free_sum_bitarrays();
         free_part_sum_bitarrays();
+
+        return (key_found) ? PM3_SUCCESS : PM3_EFAILED;
     }
+
     return PM3_SUCCESS;
 }
diff --git a/client/src/cmdlfem4x50.c b/client/src/cmdlfem4x50.c
index 9b5bac06b..07b1f91b0 100644
--- a/client/src/cmdlfem4x50.c
+++ b/client/src/cmdlfem4x50.c
@@ -19,6 +19,7 @@
 #include "cliparser.h"
 #include "cmdlfem4x50.h"
 #include <ctype.h>
+#include <math.h>
 #include "cmdparser.h"    // command_t
 #include "util_posix.h"  // msclock
 #include "fileutils.h"
@@ -349,54 +350,118 @@ int CmdEM4x50Brute(const char *Cmd) {
     CLIParserContext *ctx;
     CLIParserInit(&ctx, "lf em 4x50 brute",
                   "Tries to bruteforce the password of a EM4x50 card.\n"
-                  "Function can be stopped by pressing pm3 button.",
-                  "lf em 4x50 brute --first 12330000 --last 12340000   -> tries pwds from 0x12330000 to 0x1234000000\n"
+                  "Function can be stopped by pressing pm3 button.\n",
+
+                  "lf em 4x50 brute --mode range --begin 12330000 --end 12340000 -> tries pwds from 0x12330000 to 0x12340000\n"
+                  "lf em 4x50 brute --mode charset --digits --uppercase -> tries all combinations of ASCII codes for digits and uppercase letters\n"
                  );
 
     void *argtable[] = {
         arg_param_begin,
-        arg_str1(NULL, "first", "<hex>", "first password (start), 4 bytes, lsb"),
-        arg_str1(NULL, "last", "<hex>",   "last password (stop), 4 bytes, lsb"),
+        arg_str1(NULL, "mode", "<str>", "Bruteforce mode (range|charset)"),
+        arg_str0(NULL, "begin", "<hex>",   "Range mode - start of the key range"),
+        arg_str0(NULL, "end", "<hex>",   "Range mode - end of the key range"),
+        arg_lit0(NULL, "digits",  "Charset mode - include ASCII codes for digits"),
+        arg_lit0(NULL, "uppercase",  "Charset mode - include ASCII codes for uppercase letters"),
         arg_param_end
     };
 
     CLIExecWithReturn(ctx, Cmd, argtable, true);
-    int first_len = 0;
-    uint8_t first[4] = {0, 0, 0, 0};
-    CLIGetHexWithReturn(ctx, 1, first, &first_len);
-    int last_len = 0;
-    uint8_t last[4] = {0, 0, 0, 0};
-    CLIGetHexWithReturn(ctx, 2, last, &last_len);
-    CLIParserFree(ctx);
-
-    if (first_len != 4) {
-        PrintAndLogEx(FAILED, "password length must be 4 bytes");
-        return PM3_EINVARG;
-    }
-    if (last_len != 4) {
-        PrintAndLogEx(FAILED, "password length must be 4 bytes");
-        return PM3_EINVARG;
-    }
 
     em4x50_data_t etd;
-    etd.password1 = BYTES2UINT32_BE(first);
-    etd.password2 = BYTES2UINT32_BE(last);
+    memset(&etd, 0, sizeof(etd));
+
+    int mode_len = 64;
+    char mode[64];
+    CLIGetStrWithReturn(ctx, 1, (uint8_t *) mode, &mode_len);
+    PrintAndLogEx(INFO, "Chosen mode: %s", mode);
+
+    if (strcmp(mode, "range") == 0) {
+        etd.bruteforce_mode = BRUTEFORCE_MODE_RANGE;
+    } else if (strcmp(mode, "charset") == 0) {
+        etd.bruteforce_mode = BRUTEFORCE_MODE_CHARSET;
+    } else {
+        PrintAndLogEx(FAILED, "Unknown bruteforce mode: %s", mode);
+        CLIParserFree(ctx);
+        return PM3_EINVARG;
+    }
+
+    if (etd.bruteforce_mode == BRUTEFORCE_MODE_RANGE) {
+        int begin_len = 0;
+        uint8_t begin[4] = {0x0};
+        CLIGetHexWithReturn(ctx, 2, begin, &begin_len);
+
+        int end_len = 0;
+        uint8_t end[4] = {0x0};
+        CLIGetHexWithReturn(ctx, 3, end, &end_len);
+
+        if (begin_len != 4) {
+            PrintAndLogEx(FAILED, "'begin' parameter must be 4 bytes");
+            CLIParserFree(ctx);
+            return PM3_EINVARG;
+        }
+
+        if (end_len != 4) {
+            PrintAndLogEx(FAILED, "'end' parameter must be 4 bytes");
+            CLIParserFree(ctx);
+            return PM3_EINVARG;
+        }
+
+        etd.password1 = BYTES2UINT32_BE(begin);
+        etd.password2 = BYTES2UINT32_BE(end);
+    } else if (etd.bruteforce_mode == BRUTEFORCE_MODE_CHARSET) {
+        bool enable_digits = arg_get_lit(ctx, 4);
+        bool enable_uppercase = arg_get_lit(ctx, 5);
+
+        if (enable_digits)
+            etd.bruteforce_charset |= CHARSET_DIGITS;
+        if (enable_uppercase)
+            etd.bruteforce_charset |= CHARSET_UPPERCASE;
+
+        if (etd.bruteforce_charset == 0) {
+            PrintAndLogEx(FAILED, "Please enable at least one charset when using charset bruteforce mode.");
+            CLIParserFree(ctx);
+            return PM3_EINVARG;
+        }
+
+        PrintAndLogEx(INFO, "Enabled charsets: %s%s",
+                      enable_digits ? "digits " : "",
+                      enable_uppercase ? "uppercase " : "");
+
+    }
+
+    CLIParserFree(ctx);
 
     // 27 passwords/second (empirical value)
     const int speed = 27;
+    int no_iter = 0;
+
+    if (etd.bruteforce_mode == BRUTEFORCE_MODE_RANGE) {
+        no_iter = etd.password2 - etd.password1 + 1;
+        PrintAndLogEx(INFO, "Trying " _YELLOW_("%i") " passwords in range [0x%08x, 0x%08x]"
+                      , no_iter
+                      , etd.password1
+                      , etd.password2
+                     );
+    } else if (etd.bruteforce_mode == BRUTEFORCE_MODE_CHARSET) {
+        unsigned int digits = 0;
+
+        if (etd.bruteforce_charset & CHARSET_DIGITS)
+            digits += CHARSET_DIGITS_SIZE;
+
+        if (etd.bruteforce_charset & CHARSET_UPPERCASE)
+            digits += CHARSET_UPPERCASE_SIZE;
+
+        no_iter = pow(digits, 4);
+    }
 
     // print some information
-    int no_iter = etd.password2 - etd.password1 + 1;
     int dur_s = no_iter / speed;
     int dur_h = dur_s / 3600;
     int dur_m = (dur_s - dur_h * 3600) / 60;
 
     dur_s -= dur_h * 3600 + dur_m * 60;
-    PrintAndLogEx(INFO, "Trying " _YELLOW_("%i") " passwords in range [0x%08x, 0x%08x]"
-                  , no_iter
-                  , etd.password1
-                  , etd.password2
-                 );
+
     PrintAndLogEx(INFO, "Estimated duration: %ih %im %is", dur_h, dur_m, dur_s);
 
     // start
@@ -1190,7 +1255,7 @@ int CmdEM4x50Sim(const char *Cmd) {
 static command_t CommandTable[] = {
     {"help",   CmdHelp,              AlwaysAvailable, "This help"},
     {"-----------", CmdHelp,         AlwaysAvailable, "--------------------- " _CYAN_("operations") " ---------------------"},
-    {"brute",   CmdEM4x50Brute,      IfPm3EM4x50,     "Simple bruteforce attack to find password"},
+    {"brute",   CmdEM4x50Brute,      IfPm3EM4x50,     "Bruteforce attack to find password"},
     {"chk",     CmdEM4x50Chk,        IfPm3EM4x50,     "Check passwords from dictionary"},
     {"dump",    CmdEM4x50Dump,       IfPm3EM4x50,     "Dump EM4x50 tag"},
     {"info",    CmdEM4x50Info,       IfPm3EM4x50,     "Tag information"},
diff --git a/client/src/cmdusart.c b/client/src/cmdusart.c
index d67ae9bf1..0d33ef374 100644
--- a/client/src/cmdusart.c
+++ b/client/src/cmdusart.c
@@ -68,15 +68,20 @@ static int usart_txrx(uint8_t *srcdata, size_t srclen, uint8_t *dstdata, size_t
         struct payload_header header;
         uint8_t data[PM3_CMD_DATA_SIZE - sizeof(uint32_t)];
     } PACKED payload;
+
     payload.header.waittime = waittime;
-    if (srclen >= sizeof(payload.data))
+
+    if (srclen >= sizeof(payload.data)) {
         return PM3_EOVFLOW;
+    }
+
     memcpy(payload.data, srcdata, srclen);
     SendCommandNG(CMD_USART_TXRX, (uint8_t *)&payload, srclen + sizeof(payload.header));
     PacketResponseNG resp;
-    if (!WaitForResponseTimeout(CMD_USART_TXRX, &resp, waittime + 500)) {
+    if (WaitForResponseTimeout(CMD_USART_TXRX, &resp, waittime + 500) == false) {
         return PM3_ETIMEOUT;
     }
+
     if (resp.status == PM3_SUCCESS) {
         *dstlen = resp.length;
         memcpy(dstdata, resp.data.asBytes, resp.length);
@@ -154,10 +159,11 @@ static int usart_bt_testcomm(uint32_t baudrate, uint8_t parity) {
 
     PrintAndLogEx(SUCCESS, "TX (%3zu):%.*s at %u 8%c1", strlen(string), (int)strlen(string), string, baudrate, parity);
 
-    ret = usart_txrx((uint8_t *)string, strlen(string), data, &len, 1000); // such large timeout needed
+    // 1000, such large timeout needed
+    ret = usart_txrx((uint8_t *)string, strlen(string), data, &len, 1000);
     if (ret == PM3_SUCCESS) {
         PrintAndLogEx(SUCCESS, "RX (%3zu):%.*s", len, (int)len, data);
-        if (strcmp((char *)data, "hc01.comV2.0") == 0) {
+        if (str_startswith((char *)data, "hc01.comV2.0") || str_startswith((char *)data, "BT SPP V3.0")) {
             PrintAndLogEx(SUCCESS, "Add-on " _GREEN_("found!"));
             return PM3_SUCCESS;
         }
diff --git a/client/src/comms.c b/client/src/comms.c
index a8ed8be4c..64bea9f65 100644
--- a/client/src/comms.c
+++ b/client/src/comms.c
@@ -30,8 +30,8 @@
 #include "util_posix.h" // msclock
 #include "util_darwin.h" // en/dis-ableNapp();
 
-//#define COMMS_DEBUG
-//#define COMMS_DEBUG_RAW
+// #define COMMS_DEBUG
+// #define COMMS_DEBUG_RAW
 
 // Serial port that we are communicating with the PM3 on.
 static serial_port sp = NULL;
@@ -369,6 +369,7 @@ __attribute__((force_align_arg_pointer))
         }
 
         res = uart_receive(sp, (uint8_t *)&rx_raw.pre, sizeof(PacketResponseNGPreamble), &rxlen);
+
         if ((res == PM3_SUCCESS) && (rxlen == sizeof(PacketResponseNGPreamble))) {
             rx.magic = rx_raw.pre.magic;
             uint16_t length = rx_raw.pre.length;
@@ -380,6 +381,7 @@ __attribute__((force_align_arg_pointer))
                     PrintAndLogEx(WARNING, "Received packet frame with incompatible length: 0x%04x", length);
                     error = true;
                 }
+
                 if ((!error) && (length > 0)) { // Get the variable length payload
 
                     res = uart_receive(sp, (uint8_t *)&rx_raw.data, length, &rxlen);
@@ -418,10 +420,10 @@ __attribute__((force_align_arg_pointer))
                         rx.length = 0; // set received length to 0
                     else {  // old frames can't be empty
                         PrintAndLogEx(WARNING, "Received empty MIX packet frame (length: 0x00)");
-
                         error = true;
                     }
                 }
+
                 if (!error) {                        // Get the postamble
                     res = uart_receive(sp, (uint8_t *)&rx_raw.foopost, sizeof(PacketResponseNGPostamble), &rxlen);
                     if ((res != PM3_SUCCESS) || (rxlen != sizeof(PacketResponseNGPostamble))) {
@@ -429,6 +431,7 @@ __attribute__((force_align_arg_pointer))
                         error = true;
                     }
                 }
+
                 if (!error) {                        // Check CRC, accept MAGIC as placeholder
                     rx.crc = rx_raw.foopost.crc;
                     if (rx.crc != RESPONSENG_POSTAMBLE_MAGIC) {
diff --git a/client/src/fileutils.c b/client/src/fileutils.c
index 3c904ac70..8fd06456e 100644
--- a/client/src/fileutils.c
+++ b/client/src/fileutils.c
@@ -805,7 +805,7 @@ int createMfcKeyDump(const char *preferredName, uint8_t sectorsCnt, sector_t *e_
     fflush(f);
     fclose(f);
     PrintAndLogEx(SUCCESS, "Found keys have been dumped to " _YELLOW_("%s"), fileName);
-    PrintAndLogEx(INFO, "FYI! --> " _YELLOW_("0xFFFFFFFFFFFF") " <-- has been inserted for unknown keys where " _YELLOW_("res") " is " _YELLOW_("0"));
+    PrintAndLogEx(INFO, "FYI! --> " _YELLOW_("0xFFFFFFFFFFFF") " <-- has been inserted for unknown keys where " _YELLOW_("res") " is " _RED_("0"));
     free(fileName);
     return PM3_SUCCESS;
 }
diff --git a/client/src/mifare/mifare4.c b/client/src/mifare/mifare4.c
index f42111ba8..ec8d1a6bf 100644
--- a/client/src/mifare/mifare4.c
+++ b/client/src/mifare/mifare4.c
@@ -530,7 +530,7 @@ uint8_t mfSectorTrailerOfSector(uint8_t sectorNo) {
 }
 
 // assumes blockno is 0-255..
-uint8_t mfSectorTrailer(uint8_t blockNo) {
+uint8_t mfSectorTrailer(uint16_t blockNo) {
     if (blockNo < 32 * 4) {
         return (blockNo | 0x03);
     } else {
@@ -539,15 +539,15 @@ uint8_t mfSectorTrailer(uint8_t blockNo) {
 }
 
 // assumes blockno is 0-255..
-bool mfIsSectorTrailer(uint8_t blockNo) {
+bool mfIsSectorTrailer(uint16_t blockNo) {
     return (blockNo == mfSectorTrailer(blockNo));
 }
 
 // assumes blockno is 0-255..
-uint8_t mfSectorNum(uint8_t blockNo) {
+uint8_t mfSectorNum(uint16_t blockNo) {
     if (blockNo < 32 * 4)
-        return blockNo / 4;
+        return (blockNo / 4);
     else
-        return 32 + (blockNo - 32 * 4) / 16;
+        return (32 + (blockNo - 32 * 4) / 16);
 
 }
diff --git a/client/src/mifare/mifare4.h b/client/src/mifare/mifare4.h
index 489add9f3..80d55db7b 100644
--- a/client/src/mifare/mifare4.h
+++ b/client/src/mifare/mifare4.h
@@ -77,9 +77,9 @@ const char *mfGetAccessConditionsDesc(uint8_t blockn, const uint8_t *data);
 uint8_t mfNumBlocksPerSector(uint8_t sectorNo);
 uint8_t mfFirstBlockOfSector(uint8_t sectorNo);
 uint8_t mfSectorTrailerOfSector(uint8_t sectorNo);
-uint8_t mfSectorTrailer(uint8_t blockNo);
-bool mfIsSectorTrailer(uint8_t blockNo);
-uint8_t mfSectorNum(uint8_t blockNo);
+uint8_t mfSectorTrailer(uint16_t blockNo);
+bool mfIsSectorTrailer(uint16_t blockNo);
+uint8_t mfSectorNum(uint16_t blockNo);
 
 
 #endif // mifare4.h
diff --git a/client/src/mifare/mifaredefault.h b/client/src/mifare/mifaredefault.h
index 941abf41c..e3590329d 100644
--- a/client/src/mifare/mifaredefault.h
+++ b/client/src/mifare/mifaredefault.h
@@ -45,7 +45,10 @@ static const uint64_t g_mifare_default_keys[] = {
     0xffffffffffff, // Default key (first key used by program if no user defined key)
     0xa0a1a2a3a4a5, // NFCForum MAD key
     0xd3f7d3f7d3f7, // NDEF public key
-    0x4b791bea7bcc, // MFC EV1 Signature B
+    0x4b791bea7bcc, // MFC EV1 Signature 17 B
+    0x5C8FF9990DA2, // MFC EV1 Signature 16 A
+    0xD01AFEEB890A, // MFC EV1 Signature 16 B
+    0x75CCB59C9BED, // MFC EV1 Signature 17 A
     0xfc00018778f7, // Public Transport
     0x6471a5ef2d1a, // SimonsVoss
     0x4E3552426B32, // ID06
@@ -72,6 +75,11 @@ static const uint64_t g_mifare_default_keys[] = {
     0x199404281998, // NSP B
     0x6A1987C40A21, // SALTO
     0x7F33625BC129, // SALTO
+    0x484944204953, // HID
+    0x204752454154, // HID
+    0x3B7E4FD575AD, // HID
+    0x11496F97752A, // HID
+    0x3E65E4FB65B3, // Gym
     0x000000000000, // Blank key
     0xb0b1b2b3b4b5,
     0xaabbccddeeff,
diff --git a/client/src/uart/uart_posix.c b/client/src/uart/uart_posix.c
index b2a858e09..86d76317b 100644
--- a/client/src/uart/uart_posix.c
+++ b/client/src/uart/uart_posix.c
@@ -285,6 +285,7 @@ serial_port uart_open(const char *pcPortName, uint32_t speed) {
 
     // Try to retrieve the old (current) terminal info struct
     if (tcgetattr(sp->fd, &sp->tiOld) == -1) {
+        PrintAndLogEx(ERR, "error: UART get terminal info attribute");
         uart_close(sp);
         return INVALID_SERIAL_PORT;
     }
@@ -305,6 +306,8 @@ serial_port uart_open(const char *pcPortName, uint32_t speed) {
 
     // Try to set the new terminal info struct
     if (tcsetattr(sp->fd, TCSANOW, &sp->tiNew) == -1) {
+        PrintAndLogEx(ERR, "error: UART set terminal info attribute");
+        perror("tcsetattr() error");
         uart_close(sp);
         return INVALID_SERIAL_PORT;
     }
diff --git a/client/src/uart/uart_win32.c b/client/src/uart/uart_win32.c
index 9cdcc41d1..cb8b92a73 100644
--- a/client/src/uart/uart_win32.c
+++ b/client/src/uart/uart_win32.c
@@ -98,6 +98,7 @@ serial_port uart_open(const char *pcPortName, uint32_t speed) {
         free(prefix);
 
         if (strlen(pcPortName) <= 4) {
+            PrintAndLogEx(ERR, "error: tcp port name length too short");
             free(sp);
             return INVALID_SERIAL_PORT;
         }
diff --git a/common/bruteforce.c b/common/bruteforce.c
new file mode 100644
index 000000000..891796690
--- /dev/null
+++ b/common/bruteforce.c
@@ -0,0 +1,129 @@
+//-----------------------------------------------------------------------------
+// Copyright (C) Proxmark3 contributors. See AUTHORS.md for details.
+//
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+//
+// See LICENSE.txt for the text of the license.
+//-----------------------------------------------------------------------------
+
+#include "bruteforce.h"
+#include <string.h>
+#include <stdio.h>
+
+uint8_t charset_digits[] = {
+    '0', '1', '2', '3', '4', '5', '6', '7', '8', '9',
+};
+
+uint8_t charset_uppercase[] = {
+    'A', 'B', 'C', 'D', 'E', 'F', 'G', 'H', 'I', 'J', 'K',
+    'L', 'M', 'N', 'O', 'P', 'Q', 'R', 'S', 'T', 'U', 'W',
+    'X', 'Y', 'Z'
+};
+
+void bf_generator_init(generator_context_t *ctx, uint8_t mode) {
+    memset(ctx, 0, sizeof(generator_context_t));
+    ctx->mode = mode;
+}
+
+int bf_generator_set_charset(generator_context_t *ctx, uint8_t charsets) {
+    if (ctx->mode != BRUTEFORCE_MODE_CHARSET) {
+        return -1;
+    }
+
+    if (charsets & CHARSET_DIGITS) {
+        memcpy(ctx->charset, charset_digits, sizeof(charset_digits));
+        ctx->charset_length += sizeof(charset_digits);
+    }
+
+    if (charsets & CHARSET_UPPERCASE) {
+        memcpy(ctx->charset + ctx->charset_length, charset_uppercase, sizeof(charset_uppercase));
+        ctx->charset_length += sizeof(charset_uppercase);
+    }
+
+    return 0;
+}
+
+int bf_generate32(generator_context_t *ctx) {
+
+    switch (ctx->mode) {
+        case BRUTEFORCE_MODE_RANGE:
+            return _bf_generate_mode_range32(ctx);
+        case BRUTEFORCE_MODE_CHARSET:
+            return _bf_generate_mode_charset32(ctx);
+    }
+
+    return GENERATOR_ERROR;
+}
+
+int _bf_generate_mode_range32(generator_context_t *ctx) {
+
+    if (ctx->current_key32 >= ctx->range_high) {
+        return GENERATOR_END;
+    }
+
+    // we use flag1 as indicator if value of range_low was already emitted
+    // so the range generated is <range_low, range_high>
+    if (ctx->current_key32 <= ctx->range_low && ctx->flag1 == false) {
+        ctx->current_key32 = ctx->range_low;
+        ctx->pos[0] = true;
+        return GENERATOR_NEXT;
+    }
+
+    ctx->current_key32++;
+    return GENERATOR_NEXT;
+}
+
+int _bf_generate_mode_charset32(generator_context_t *ctx) {
+
+    if (ctx->flag1)
+        return GENERATOR_END;
+
+    ctx->current_key32 = ctx->charset[ctx->pos[0]] << 24 | ctx->charset[ctx->pos[1]] << 16 |
+                         ctx->charset[ctx->pos[2]] << 8 | ctx->charset[ctx->pos[3]];
+
+
+    if (bf_array_increment(ctx->pos, 4, ctx->charset_length) == -1)
+        // set flag1 to emit value last time and end generation
+        ctx->flag1 = true;
+
+    return GENERATOR_NEXT;
+}
+
+// increments values in array with carryover using modulo limit for each byte
+// this is used to iterate each byte in key over charset table
+// returns -1 if incrementing reaches its end
+int bf_array_increment(uint8_t *data, uint8_t data_len, uint8_t modulo) {
+
+    uint8_t prev_value;
+
+    // check if we reached max value already
+    uint8_t i;
+    for (i = 0; i < data_len; i++)
+        if (data[i] < modulo - 1)
+            break;
+
+    if (i == data_len)
+        return -1;
+
+    for (uint8_t pos = data_len - 1;; pos--) {
+        prev_value = ++data[pos];
+        data[pos] = data[pos] % modulo;
+        if (prev_value == data[pos])
+            return 0;
+        else if (pos == 0) {
+            // we cannot carryover to next byte
+            // with the max value check in place before, we should not reach this place
+            return -1;
+        }
+    }
+
+    return 0;
+}
diff --git a/common/bruteforce.h b/common/bruteforce.h
new file mode 100644
index 000000000..91e01172d
--- /dev/null
+++ b/common/bruteforce.h
@@ -0,0 +1,79 @@
+//-----------------------------------------------------------------------------
+// Copyright (C) Proxmark3 contributors. See AUTHORS.md for details.
+//
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+//
+// See LICENSE.txt for the text of the license.
+//-----------------------------------------------------------------------------
+// functions for bruteforcing card keys - key generators
+//-----------------------------------------------------------------------------
+
+#ifndef BRUTEFORCE_H__
+#define BRUTEFORCE_H__
+
+#include "common.h"
+
+typedef uint8_t bruteforce_mode_t;
+// bruteforcing all keys sequentially between X and Y
+#define BRUTEFORCE_MODE_RANGE 1
+
+// try keys based on limited charset/passphrases
+// some payment systems use user-provided passphrase as system key
+#define BRUTEFORCE_MODE_CHARSET 2
+
+// "smart" mode - try some predictable patterns
+#define BRUTEFORCE_MODE_SMART 3
+
+
+typedef uint8_t bruteforce_charset_t;
+// bit flags - can be used together using logical OR
+#define CHARSET_DIGITS 1
+#define CHARSET_UPPERCASE 2
+
+#define GENERATOR_END 0
+#define GENERATOR_NEXT 1
+#define GENERATOR_ERROR 2
+
+#define CHARSET_DIGITS_SIZE 10
+#define CHARSET_UPPERCASE_SIZE 25
+
+extern uint8_t charset_digits[];
+extern uint8_t charset_uppercase[];
+
+// structure to hold key generator temporary data
+typedef struct {
+    // position of each of 4 bytes in 32 bit key in charset mode
+    // add more bytes to support larger keys
+    // pos[0] is most significant byte - all maths avoid relying on little/big endian memory layout
+    uint8_t pos[4];
+    uint32_t current_key32;
+    uint8_t mode;
+    uint8_t charset[
+     CHARSET_DIGITS_SIZE
+     + CHARSET_UPPERCASE_SIZE
+    ];
+    uint8_t charset_length;
+
+    uint32_t range_low;
+    uint32_t range_high;
+    // flags to use internally by generators as they wish
+    bool flag1, flag2, flag3;
+
+} generator_context_t;
+
+void bf_generator_init(generator_context_t *ctx, uint8_t mode);
+int bf_generator_set_charset(generator_context_t *ctx, uint8_t charsets);
+int bf_generate32(generator_context_t *ctx);
+int _bf_generate_mode_range32(generator_context_t *ctx);
+int _bf_generate_mode_charset32(generator_context_t *ctx);
+int _bf_generate_mode_smart32(generator_context_t *ctx);
+int bf_array_increment(uint8_t *data, uint8_t data_len, uint8_t modulo);
+#endif // BRUTEFORCE_H__
diff --git a/doc/commands.json b/doc/commands.json
index 5fc6d2285..efb03edd2 100644
--- a/doc/commands.json
+++ b/doc/commands.json
@@ -4370,9 +4370,10 @@
                 "--1k MIFARE Classic 1k / S50 (def)",
                 "--2k MIFARE Classic/Plus 2k",
                 "--4k MIFARE Classic 4k / S70",
-                "-v, --verbose verbose output"
+                "-v, --verbose verbose output",
+                "--sk Save extracted keys to file"
             ],
-            "usage": "hf mf eview [-hv] [--mini] [--1k] [--2k] [--4k]"
+            "usage": "hf mf eview [-hv] [--mini] [--1k] [--2k] [--4k] [--sk]"
         },
         "hf mf fchk": {
             "command": "hf mf fchk",
@@ -4950,9 +4951,10 @@
             "options": [
                 "-h, --help This help",
                 "-f, --file <fn> filename of dump",
-                "-v, --verbose verbose output"
+                "-v, --verbose verbose output",
+                "--sk Save extracted keys to file"
             ],
-            "usage": "hf mf view [-hv] -f <fn>"
+            "usage": "hf mf view [-hv] -f <fn> [--sk]"
         },
         "hf mf wipe": {
             "command": "hf mf wipe",
@@ -8061,15 +8063,19 @@
             "command": "lf em 4x50 brute",
             "description": "Tries to bruteforce the password of a EM4x50 card. Function can be stopped by pressing pm3 button.",
             "notes": [
-                "lf em 4x50 brute --first 12330000 --last 12340000 -> tries pwds from 0x12330000 to 0x1234000000"
+                "lf em 4x50 brute --mode range --begin 12330000 --end 12340000 -> tries pwds from 0x12330000 to 0x12340000",
+                "lf em 4x50 brute --mode charset --digits --uppercase -> tries all combinations of ASCII codes for digits and uppercase letters"
             ],
             "offline": false,
             "options": [
                 "-h, --help This help",
-                "--first <hex> first password (start), 4 bytes, lsb",
-                "--last <hex> last password (stop), 4 bytes, lsb"
+                "--mode <str> Bruteforce mode (range|charset)",
+                "--begin <hex> Range mode - start of the key range",
+                "--end <hex> Range mode - end of the key range",
+                "--digits Charset mode - include ASCII codes for digits",
+                "--uppercase Charset mode - include ASCII codes for uppercase letters"
             ],
-            "usage": "lf em 4x50 brute [-h] --first <hex> --last <hex>"
+            "usage": "lf em 4x50 brute [-h] --mode <str> [--begin <hex>] [--end <hex>] [--digits] [--uppercase]"
         },
         "lf em 4x50 chk": {
             "command": "lf em 4x50 chk",
@@ -10896,7 +10902,7 @@
             "options": [
                 "-h, --help This help",
                 "-f, --file <fn> SPIFFS file to view",
-                "-c, --cols <dec> column breaks (def 32)"
+                "-c, --cols <dec> column breaks (def 16)"
             ],
             "usage": "mem spiffs view [-h] -f <fn> [-c <dec>]"
         },
@@ -12019,5 +12025,6 @@
         "commands_extracted": 755,
         "extracted_by": "PM3Help2JSON v1.00",
         "extracted_on": "2023-06-04T15:36:56"
+
     }
 }
\ No newline at end of file
diff --git a/doc/commands.md b/doc/commands.md
index c11a548e8..938413fa8 100644
--- a/doc/commands.md
+++ b/doc/commands.md
@@ -875,7 +875,7 @@ Check column "offline" for their availability.
 |command                  |offline |description
 |-------                  |------- |-----------
 |`lf em 4x50 help        `|Y       |`This help`
-|`lf em 4x50 brute       `|N       |`Simple bruteforce attack to find password`
+|`lf em 4x50 brute       `|N       |`Bruteforce attack to find password`
 |`lf em 4x50 chk         `|N       |`Check passwords from dictionary`
 |`lf em 4x50 dump        `|N       |`Dump EM4x50 tag`
 |`lf em 4x50 info        `|N       |`Tag information`
diff --git a/doc/uart_notes.md b/doc/uart_notes.md
index 5c8cb65b6..eeee8a1d0 100644
--- a/doc/uart_notes.md
+++ b/doc/uart_notes.md
@@ -199,7 +199,7 @@ The ROLE command takes its parameter after an equal sign:
 
 |Command            |Description                                           |Reply         |
 |-------------------|------------------------------------------------------|--------------|
-|`AT+VERSION`       |print firmware version                                |`hc01.comV2.0`|
+|`AT+VERSION`       |print firmware version                                |`hc01.comV2.0` or `BT SPP V3.0`|
 |`AT+BAUD8`         |set baudrate to 115200                                |`OK115200`    |
 |`AT+PIN1234`       |set PINCODE to 1234. (must be numbers)                |`OKsetPIN`    |
 |`AT+NAMEPM3_RDV4.0`|set device name (as shown to BT hosts) to `PM3_RDV4.0`|`OKsetname`   |
diff --git a/fpga-xc2s30/fpga_felica.bit b/fpga-xc2s30/fpga_felica.bit
index 83009b499..30ea16e33 100644
Binary files a/fpga-xc2s30/fpga_felica.bit and b/fpga-xc2s30/fpga_felica.bit differ
diff --git a/fpga-xc2s30/fpga_hf.bit b/fpga-xc2s30/fpga_hf.bit
index 06a4569f9..72f3d619e 100644
Binary files a/fpga-xc2s30/fpga_hf.bit and b/fpga-xc2s30/fpga_hf.bit differ
diff --git a/fpga-xc2s30/fpga_hf_15.bit b/fpga-xc2s30/fpga_hf_15.bit
index 0e59dd3d0..5d99a0032 100644
Binary files a/fpga-xc2s30/fpga_hf_15.bit and b/fpga-xc2s30/fpga_hf_15.bit differ
diff --git a/fpga-xc2s30/fpga_lf.bit b/fpga-xc2s30/fpga_lf.bit
index 93a26841a..f5e5ce630 100644
Binary files a/fpga-xc2s30/fpga_lf.bit and b/fpga-xc2s30/fpga_lf.bit differ
diff --git a/fpga-xc2s30/hi_iso14443a.v b/fpga-xc2s30/hi_iso14443a.v
index c9bc64f94..d52ab4000 100644
--- a/fpga-xc2s30/hi_iso14443a.v
+++ b/fpga-xc2s30/hi_iso14443a.v
@@ -222,7 +222,7 @@ reg signed [10:0] rx_mod_falling_edge_max;
 reg signed [10:0] rx_mod_rising_edge_max;
 reg curbit;
 
-`define EDGE_DETECT_THRESHOLD   3
+`define EDGE_DETECT_THRESHOLD   5
 `define EDGE_DETECT_THRESHOLDHIGH   20
 
 always @(negedge adc_clk)
diff --git a/include/em4x50.h b/include/em4x50.h
index bed01901c..9bf1ffc24 100644
--- a/include/em4x50.h
+++ b/include/em4x50.h
@@ -20,6 +20,7 @@
 #define EM4X50_H__
 
 #include "common.h"
+#include "bruteforce.h"
 
 #define EM4X50_NO_WORDS             34
 
@@ -62,6 +63,8 @@ typedef struct {
     uint32_t password2;
     uint32_t word;
     uint32_t addresses;
+    bruteforce_mode_t bruteforce_mode;
+    bruteforce_charset_t bruteforce_charset;
 } PACKED em4x50_data_t;
 
 typedef struct {
diff --git a/pm3 b/pm3
index 7c1d0e289..d59d10ea6 100755
--- a/pm3
+++ b/pm3
@@ -115,7 +115,7 @@ function get_pm3_list_Linux {
     if $FINDBTDIRECT; then
         # check if the MAC of a Proxmark3 was registered in the known devices
         for MAC in $(dbus-send --system --print-reply --type=method_call --dest='org.bluez' '/' org.freedesktop.DBus.ObjectManager.GetManagedObjects 2>/dev/null|\
-                         awk '/"Address"/{getline;gsub(/"/,"",$3);a=$3}/Name/{getline;if (/PM3_RDV4/) print a}'); do
+                         awk '/"Address"/{getline;gsub(/"/,"",$3);a=$3}/Name/{getline;if (/PM3_RDV4/ || /Proxmark3 SE/) print a}'); do
             PM3LIST+=("bt:$MAC")
         done
         # we don't probe the device so there is no guarantee the device is actually present
diff --git a/tools/btaddon/requirements.txt b/tools/btaddon/requirements.txt
new file mode 100644
index 000000000..3452b96e3
--- /dev/null
+++ b/tools/btaddon/requirements.txt
@@ -0,0 +1 @@
+pyserial==3.5.0