diff --git a/CHANGELOG.md b/CHANGELOG.md
index 24ea5b3a0..b5ca6b063 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -4,6 +4,7 @@ This project uses the changelog in accordance with [keepchangelog](http://keepac
 
 ## [unreleased][unreleased]
  - Added `bind` option for network connections to specify the outbound address and port (@wh201906)
+ - Changed `lf em 4x05 dump` - now supports the `--ns` nosave parameter (@iceman1001)
  - Added new command `data bmap` - breaks down a hexvalue to a binary template (@iceman1001)
  - Changed aid_desfire.json - added entreis from the Metrodroid project (@iceman1001)
  - Changed mad.json - added entries from the Metrodroid project (@iceman1001)
diff --git a/client/luascripts/lf_em_tearoff.lua b/client/luascripts/lf_em_tearoff.lua
index 2aa0dd5ee..c26979d9a 100644
--- a/client/luascripts/lf_em_tearoff.lua
+++ b/client/luascripts/lf_em_tearoff.lua
@@ -82,16 +82,16 @@ local function main(args)
     sd = sd or 2000
     ed = ed or 2100
 
-    if #password ~= 8 then
-        password = ''
+    if password ~= '' and #password ~= 8 then
+        return oops('password must be 4 hex bytes')
     end
 
     if #wr_value ~= 8 then
-        wr_value = 'FFFFFFFF'
+        return oops('write value must be 4 hex bytes')
     end
 
     if #rd_value ~= 8 then
-        rd_value = 'FFFFFFFF'
+        return oops('read value must be 4 hex bytes')
     end
 
     if sd > ed then
@@ -114,7 +114,7 @@ local function main(args)
     local set_tearoff_delay = 'hw tearoff --delay %d'
     local enable_tearoff = 'hw tearoff --on'
 
-    local wr_template = 'lf em 4x05_write %s %s %s'
+    local wr_template = 'lf em 4x05 write --addr %s --data %s --pwd %s'
 
     -- init addr to value
     core.console(wr_template:format(addr, wr_value, password))
diff --git a/client/src/cmdlfem4x05.c b/client/src/cmdlfem4x05.c
index f548d98e3..9b0e69753 100644
--- a/client/src/cmdlfem4x05.c
+++ b/client/src/cmdlfem4x05.c
@@ -514,6 +514,7 @@ int CmdEM4x05Dump(const char *Cmd) {
         arg_param_begin,
         arg_str0("p", "pwd", "<hex>", "password (00000000)"),
         arg_str0("f", "file", "<fn>", "override filename prefix (optional).  Default is based on UID"),
+        arg_lit0(NULL, "ns", "no save to file"),
         arg_param_end
     };
     CLIExecWithReturn(ctx, Cmd, argtable, true);
@@ -522,6 +523,7 @@ int CmdEM4x05Dump(const char *Cmd) {
     int fnlen = 0;
     char filename[FILE_PATH_SIZE] = {0};
     CLIParamStrToBuf(arg_get_str(ctx, 2), (uint8_t *)filename, FILE_PATH_SIZE, &fnlen);
+    bool nosave = arg_get_lit(ctx, 3);
     CLIParserFree(ctx);
 
     uint8_t addr = 0;
@@ -693,6 +695,13 @@ int CmdEM4x05Dump(const char *Cmd) {
     } else {
     }
 
+    if (nosave) {
+        PrintAndLogEx(NORMAL, "");
+        PrintAndLogEx(INFO, "Called with no save option");
+        PrintAndLogEx(NORMAL, "");
+        return PM3_SUCCESS;
+    }
+
     // all ok save dump to file
     if (success == PM3_SUCCESS) {
 
@@ -741,16 +750,16 @@ int CmdEM4x05Read(const char *Cmd) {
     bool use_pwd = false;
 
     if (addr > 15) {
-        PrintAndLogEx(ERR, "Address must be between 0 and 15");
+        PrintAndLogEx(ERR, "Address must be between 0 and 15, got " _RED_("%d"), addr);
         return PM3_EINVARG;
     }
 
     if (inputpwd == 0xFFFFFFFFFFFFFFFF) {
-        PrintAndLogEx(INFO, "Reading address %02u", addr);
+        PrintAndLogEx(INFO, "Reading address " _YELLOW_("%02u"), addr);
     } else {
         pwd = (inputpwd & 0xFFFFFFFF);
         use_pwd = true;
-        PrintAndLogEx(INFO, "Reading address %02u using password %08X", addr, pwd);
+        PrintAndLogEx(INFO, "Reading address " _YELLOW_("%02u") " using password " _YELLOW_("%08X"), addr, pwd);
     }
 
     uint32_t word = 0;
@@ -818,14 +827,14 @@ int CmdEM4x05Write(const char *Cmd) {
 
     if (use_pwd) {
         if (protect_operation)
-            PrintAndLogEx(INFO, "Writing protection words data %08X using password %08X", data, pwd);
+            PrintAndLogEx(INFO, "Writing protection words data " _YELLOW_("%08X") " using password " _YELLOW_("%08X"), data, pwd);
         else
-            PrintAndLogEx(INFO, "Writing address %d data %08X using password %08X", addr, data, pwd);
+            PrintAndLogEx(INFO, "Writing address " _YELLOW_("%d") " data " _YELLOW_("%08X") " using password " _YELLOW_("%08X"), addr, data, pwd);
     } else {
         if (protect_operation)
-            PrintAndLogEx(INFO, "Writing protection words data %08X", data);
+            PrintAndLogEx(INFO, "Writing protection words data " _YELLOW_("%08X") , data);
         else
-            PrintAndLogEx(INFO, "Writing address %d data %08X", addr, data);
+            PrintAndLogEx(INFO, "Writing address " _YELLOW_("%d") " data " _YELLOW_("%08X") , addr, data);
     }
 
     res = PM3_SUCCESS;
@@ -850,7 +859,7 @@ int CmdEM4x05Write(const char *Cmd) {
     if (status == PM3_SUCCESS)
         PrintAndLogEx(SUCCESS, "Data written and verified");
     else if (status == PM3_EFAILED)
-        PrintAndLogEx(ERR, "Tag denied %s operation", protect_operation ? "Protect" : "Write");
+        PrintAndLogEx(ERR, "Tag denied " _RED_("%s") " operation", protect_operation ? "Protect" : "Write");
     else
         PrintAndLogEx(DEBUG, "No answer from tag");