diff --git a/app/menu.c b/app/menu.c
index dcb4c89..420d86c 100644
--- a/app/menu.c
+++ b/app/menu.c
@@ -252,7 +252,6 @@ int MENU_GetLimits(uint8_t menu_id, int32_t *pMin, int32_t *pMax)
 		case MENU_500TX:
 		case MENU_350EN:
 		case MENU_SCREN:
-		case MENU_TX_EN:
 			*pMin = 0;
 			*pMax = ARRAY_SIZE(gSubMenu_OFF_ON) - 1;
 			break;
@@ -759,10 +758,19 @@ void MENU_AcceptSetting(void)
 			gSetting_350TX = gSubMenuSelection;
 			break;
 
-		case MENU_F_LOCK:
+		case MENU_F_LOCK: {
+			static uint8_t cnt;
+			if(gSubMenuSelection == F_LOCK_NONE) { // select 10 times to enable
+				cnt++;
+				if(cnt < 10)
+					return;
+			}
+			else
+				cnt = 0;
+
 			gSetting_F_LOCK = gSubMenuSelection;
 			break;
-
+		}
 		case MENU_200TX:
 			gSetting_200TX = gSubMenuSelection;
 			break;
@@ -782,10 +790,6 @@ void MENU_AcceptSetting(void)
 			gFlagReconfigureVfos    = true;
 			break;
 
-		case MENU_TX_EN:
-			gSetting_TX_EN = gSubMenuSelection;
-			break;
-
 		#ifdef ENABLE_F_CAL_MENU
 			case MENU_F_CALI:
 				writeXtalFreqCal(gSubMenuSelection, true);
@@ -1153,10 +1157,6 @@ void MENU_ShowCurrentSetting(void)
 			gSubMenuSelection = gSetting_ScrambleEnable;
 			break;
 
-		case MENU_TX_EN:
-			gSubMenuSelection = gSetting_TX_EN;
-			break;
-
 		#ifdef ENABLE_F_CAL_MENU
 			case MENU_F_CALI:
 				gSubMenuSelection = gEeprom.BK4819_XTAL_FREQ_LOW;
diff --git a/board.c b/board.c
index cf2275b..d585e6f 100644
--- a/board.c
+++ b/board.c
@@ -701,14 +701,14 @@ void BOARD_EEPROM_Init(void)
 
 	// 0F40..0F47
 	EEPROM_ReadBuffer(0x0F40, Data, 8);
-	gSetting_F_LOCK            = (Data[0] < 6) ? Data[0] : F_LOCK_OFF;
+	gSetting_F_LOCK            = (Data[0] < F_LOCK_LEN) ? Data[0] : F_LOCK_DEF;
 	gSetting_350TX             = (Data[1] < 2) ? Data[1] : false;  // was true
 	gSetting_KILLED            = (Data[2] < 2) ? Data[2] : false;
 	gSetting_200TX             = (Data[3] < 2) ? Data[3] : false;
 	gSetting_500TX             = (Data[4] < 2) ? Data[4] : false;
 	gSetting_350EN             = (Data[5] < 2) ? Data[5] : true;
 	gSetting_ScrambleEnable    = (Data[6] < 2) ? Data[6] : true;
-	gSetting_TX_EN             = (Data[7] & (1u << 0)) ? true : false;
+	//gSetting_TX_EN             = (Data[7] & (1u << 0)) ? true : false;
 	gSetting_live_DTMF_decoder = (Data[7] & (1u << 1)) ? true : false;
 	gSetting_battery_text      = (((Data[7] >> 2) & 3u) <= 2) ? (Data[7] >> 2) & 3 : 2;
 	#ifdef ENABLE_AUDIO_BAR
diff --git a/frequencies.c b/frequencies.c
index 0a6cd41..f27aba5 100644
--- a/frequencies.c
+++ b/frequencies.c
@@ -147,7 +147,7 @@ int TX_freq_check(const uint32_t Frequency)
 
 	switch (gSetting_F_LOCK)
 	{
-		case F_LOCK_OFF:
+		case F_LOCK_DEF:
 			if (Frequency >= frequencyBandTable[BAND3_137MHz].lower && Frequency < frequencyBandTable[BAND3_137MHz].upper)
 				return 0;
 			if (Frequency >= frequencyBandTable[BAND4_174MHz].lower && Frequency < frequencyBandTable[BAND4_174MHz].upper)
@@ -197,6 +197,15 @@ int TX_freq_check(const uint32_t Frequency)
 			if (Frequency >= 40000000 && Frequency < 43800000)
 				return 0;
 			break;
+
+		case F_LOCK_ALL:
+			break;
+
+		case F_LOCK_NONE:
+			for (uint8_t i = 0; i < ARRAY_SIZE(frequencyBandTable); i++)
+				if (Frequency >= frequencyBandTable[i].lower && Frequency < frequencyBandTable[i].upper)
+					return 0;
+			break;
 	}
 
 	// dis-allowed TX frequency
diff --git a/misc.c b/misc.c
index 40e6ef6..556169f 100644
--- a/misc.c
+++ b/misc.c
@@ -82,7 +82,6 @@ bool              gSetting_KILLED;
 bool              gSetting_200TX;
 bool              gSetting_500TX;
 bool              gSetting_350EN;
-bool              gSetting_TX_EN;
 uint8_t           gSetting_F_LOCK;
 bool              gSetting_ScrambleEnable;
 
diff --git a/misc.h b/misc.h
index d35fb2e..a13bd38 100644
--- a/misc.h
+++ b/misc.h
@@ -146,7 +146,6 @@ extern bool                  gSetting_KILLED;
 extern bool                  gSetting_200TX;
 extern bool                  gSetting_500TX;
 extern bool                  gSetting_350EN;
-extern bool                  gSetting_TX_EN;
 extern uint8_t               gSetting_F_LOCK;
 extern bool                  gSetting_ScrambleEnable;
 
diff --git a/radio.c b/radio.c
index 026fd36..2c8b0c8 100644
--- a/radio.c
+++ b/radio.c
@@ -1011,7 +1011,7 @@ void RADIO_PrepareTX(void)
 			}
 			else
 		#endif
-		if (!gSetting_TX_EN || gSerialConfigCountDown_500ms > 0)
+		if (gSerialConfigCountDown_500ms > 0)
 		{	// TX is disabled or config upload/download in progress
 			State = VFO_STATE_TX_DISABLE;
 		}
diff --git a/settings.c b/settings.c
index a76d8b6..82c8da9 100644
--- a/settings.c
+++ b/settings.c
@@ -174,7 +174,7 @@ void SETTINGS_SaveSettings(void)
 	State[4]  = gSetting_500TX;
 	State[5]  = gSetting_350EN;
 	State[6]  = gSetting_ScrambleEnable;
-	if (!gSetting_TX_EN)             State[7] &= ~(1u << 0);
+	//if (!gSetting_TX_EN)             State[7] &= ~(1u << 0);
 	if (!gSetting_live_DTMF_decoder) State[7] &= ~(1u << 1);
 	State[7] = (State[7] & ~(3u << 2)) | ((gSetting_battery_text & 3u) << 2);
 	#ifdef ENABLE_AUDIO_BAR
diff --git a/settings.h b/settings.h
index 2106fd6..fca1ca2 100644
--- a/settings.h
+++ b/settings.h
@@ -34,12 +34,15 @@ enum POWER_OnDisplayMode_t {
 typedef enum POWER_OnDisplayMode_t POWER_OnDisplayMode_t;
 
 enum {
-	F_LOCK_OFF = 0,
+	F_LOCK_DEF, //all default frequencies + configurable
 	F_LOCK_FCC,
 	F_LOCK_CE,
 	F_LOCK_GB,
 	F_LOCK_430,
-	F_LOCK_438
+	F_LOCK_438,
+	F_LOCK_ALL,	// disable TX on all frequencies
+	F_LOCK_NONE, // enable TX on all frequencies
+	F_LOCK_LEN
 };
 
 enum {
diff --git a/ui/menu.c b/ui/menu.c
index 57ba9ee..d52cb95 100644
--- a/ui/menu.c
+++ b/ui/menu.c
@@ -129,7 +129,6 @@ const t_menu_item MenuList[] =
 	{"Tx 500", VOICE_ID_INVALID,                       MENU_500TX         }, // was "500TX"
 	{"350 En", VOICE_ID_INVALID,                       MENU_350EN         }, // was "350EN"
 	{"ScraEn", VOICE_ID_INVALID,                       MENU_SCREN         }, // was "SCREN"
-	{"TxEnab", VOICE_ID_INVALID,                       MENU_TX_EN         }, // enable TX
 #ifdef ENABLE_F_CAL_MENU
 	{"FrCali", VOICE_ID_INVALID,                       MENU_F_CALI        }, // reference xtal calibration
 #endif
@@ -270,14 +269,16 @@ const char gSubMenu_RESET[][4] =
 	"ALL"
 };
 
-const char gSubMenu_F_LOCK[][4] =
+const char * gSubMenu_F_LOCK[] =
 {
-	"OFF",
-	"FCC",
-	"CE",
-	"GB",
-	"430",
-	"438"
+	"DEFAULT+\n137-174\n400-470",
+	"FCC HAM\n144-148\n420-450",
+	"CE HAM\n144-146\n430-440",
+	"GB HAM\n144-148\n430-440",
+	"137-174\n400-430",
+	"137-174\n400-438",
+	"DISABLE\nALL",
+	"UNLOCK\nALL",
 };
 
 const char gSubMenu_BACKLIGHT[][7] =
@@ -634,7 +635,6 @@ void UI_DisplayMenu(void)
 		case MENU_500TX:
 		case MENU_350EN:
 		case MENU_SCREN:
-		case MENU_TX_EN:
 			strcpy(String, gSubMenu_OFF_ON[gSubMenuSelection]);
 			break;
 
diff --git a/ui/menu.h b/ui/menu.h
index db70598..dfd5391 100644
--- a/ui/menu.h
+++ b/ui/menu.h
@@ -21,6 +21,7 @@
 #include <stdint.h>
 
 #include "audio.h"     // VOICE_ID_t
+#include "settings.h"
 
 typedef struct {
 	const char  name[7];    // menu display area only has room for 6 characters
@@ -110,8 +111,6 @@ enum
 	MENU_500TX,
 	MENU_350EN,
 	MENU_SCREN,
-
-	MENU_TX_EN,   // enable TX
 #ifdef ENABLE_F_CAL_MENU
 	MENU_F_CALI,  // reference xtal calibration
 #endif
@@ -148,7 +147,7 @@ extern const char*       gSubMenu_PTT_ID[5];
 extern const char        gSubMenu_PONMSG[4][8];
 extern const char        gSubMenu_ROGER[3][6];
 extern const char        gSubMenu_RESET[2][4];
-extern const char        gSubMenu_F_LOCK[6][4];
+extern const char*       gSubMenu_F_LOCK[F_LOCK_LEN];
 extern const char        gSubMenu_BACKLIGHT[8][7];
 extern const char        gSubMenu_RX_TX[4][6];
 #ifdef ENABLE_AM_FIX_TEST1