diff --git a/CHANGELOG.md b/CHANGELOG.md
index aff7f4e4e..810d2d117 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -3,6 +3,7 @@ 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]
+ - Changed `hw detectreader` - Detect both LF and HF at the same time (@wh201906)
  - Changed `hf mfu info` - should not try pwd against a UL-AES (@iceman1001)
  - Fixed `hf mfu info` - tag type identification now properly handles 64bits (@iceman1001)
  - Changed `hf st info` - reworked the output (@iceman1001)
diff --git a/armsrc/appmain.c b/armsrc/appmain.c
index 832fef61b..cdc8b6a64 100644
--- a/armsrc/appmain.c
+++ b/armsrc/appmain.c
@@ -612,6 +612,7 @@ at the same place! :-)
 #define LIGHT_LEVELS 20
 
 void ListenReaderField(uint8_t limit) {
+#define LF_HF_BOTH 0
 #define LF_ONLY 1
 #define HF_ONLY 2
 #define REPORT_CHANGE 1000    // report new values only if they have changed at least by REPORT_CHANGE mV
@@ -627,13 +628,13 @@ void ListenReaderField(uint8_t limit) {
 
     LEDsoff();
 
-    if (limit == LF_ONLY) {
+    if (limit == LF_ONLY || limit == LF_HF_BOTH) {
         lf_av = lf_max = (MAX_ADC_LF_VOLTAGE * SumAdc(ADC_CHAN_LF, 32)) >> 15;
         Dbprintf("LF 125/134kHz Baseline: %dmV", lf_av);
         lf_baseline = lf_av;
     }
 
-    if (limit == HF_ONLY) {
+    if (limit == HF_ONLY || limit == LF_HF_BOTH) {
 
         // iceman,  useless,  since we are measuring readerfield,  not our field.  My tests shows a max of 20v from a reader.
         hf_av = hf_max = (MAX_ADC_HF_VOLTAGE * SumAdc(ADC_CHAN_HF, 32)) >> 15;
@@ -643,8 +644,15 @@ void ListenReaderField(uint8_t limit) {
 
     for (;;) {
 
-        // Switch modes with button
-        if (BUTTON_PRESS()) {
+        // Switch modes with button or Enter key
+        bool modeSwitched = BUTTON_PRESS();
+        if (modeSwitched == false && data_available()) {
+            // flush the buffer
+            PacketCommandNG rx;
+            receive_ng(&rx);
+            modeSwitched = true;
+        }
+        if (modeSwitched) {
             SpinDelay(500);
             switch (mode) {
                 case 1:
@@ -661,7 +669,7 @@ void ListenReaderField(uint8_t limit) {
         }
         WDT_HIT();
 
-        if (limit == LF_ONLY) {
+        if (limit == LF_ONLY || limit == LF_HF_BOTH) {
             if (mode == 1) {
                 if (ABS(lf_av - lf_baseline) > REPORT_CHANGE)
                     LED_D_ON();
@@ -679,7 +687,7 @@ void ListenReaderField(uint8_t limit) {
             }
         }
 
-        if (limit == HF_ONLY) {
+        if (limit == HF_ONLY || limit == LF_HF_BOTH) {
             if (mode == 1) {
                 if (ABS(hf_av - hf_baseline) > REPORT_CHANGE)
                     LED_B_ON();
@@ -2312,6 +2320,7 @@ static void PacketReceived(PacketCommandNG *packet) {
             if (packet->length != sizeof(uint8_t))
                 break;
             ListenReaderField(packet->data.asBytes[0]);
+            reply_ng(CMD_LISTEN_READER_FIELD, PM3_EOPABORTED, NULL, 0);
             break;
         }
         case CMD_FPGA_MAJOR_MODE_OFF: { // ## FPGA Control
diff --git a/client/src/cmdhw.c b/client/src/cmdhw.c
index 767935a77..e53f7063e 100644
--- a/client/src/cmdhw.c
+++ b/client/src/cmdhw.c
@@ -529,13 +529,14 @@ static int CmdDetectReader(const char *Cmd) {
     CLIParserContext *ctx;
     CLIParserInit(&ctx, "hw detectreader",
                   "Start to detect presences of reader field",
+                  "hw detectreader\n"
                   "hw detectreader -L\n"
                  );
 
     void *argtable[] = {
         arg_param_begin,
-        arg_lit0("L", "LF", "detect low frequency 125/134 kHz"),
-        arg_lit0("H", "HF", "detect high frequency 13.56 MHZ"),
+        arg_lit0("L", "LF", "only detect low frequency 125/134 kHz"),
+        arg_lit0("H", "HF", "only detect high frequency 13.56 MHZ"),
         arg_param_end
     };
     CLIExecWithReturn(ctx, Cmd, argtable, true);
@@ -543,20 +544,35 @@ static int CmdDetectReader(const char *Cmd) {
     bool hf = arg_get_lit(ctx, 2);
     CLIParserFree(ctx);
 
-    if ((lf + hf) > 1) {
-        PrintAndLogEx(INFO, "Can only set one frequency");
-        return PM3_EINVARG;
+    // 0: Detect both frequency in mode 1
+    // 1: LF_ONLY
+    // 2: HF_ONLY
+    uint8_t arg = 0;
+    if (lf == true && hf == false) {
+        arg = 1;
+    } else if (hf == true && lf == false) {
+        arg = 2;
     }
 
-    uint8_t arg = 0;
-    if (lf)
-        arg = 1;
-    else if (hf)
-        arg = 2;
-
-    PrintAndLogEx(INFO, "Press " _GREEN_("pm3 button") " to change modes and exit");
     clearCommandBuffer();
     SendCommandNG(CMD_LISTEN_READER_FIELD, (uint8_t *)&arg, sizeof(arg));
+    PrintAndLogEx(INFO, "Press " _GREEN_("pm3 button") " or " _GREEN_("<Enter>") " to change modes and exit");
+
+    for (;;) {
+        if (kbd_enter_pressed()) {
+            SendCommandNG(CMD_BREAK_LOOP, NULL, 0);
+            PrintAndLogEx(DEBUG, _GREEN_("<Enter>") " pressed");
+        }
+
+        PacketResponseNG resp;
+        if (WaitForResponseTimeout(CMD_LISTEN_READER_FIELD, &resp, 1000)) {
+            if (resp.status != PM3_EOPABORTED) {
+                PrintAndLogEx(ERR, "Unexpected response: %d", resp.status);
+            }
+            break;
+        }
+    }
+    PrintAndLogEx(INFO, "Done!");
     return PM3_SUCCESS;
 }