diff --git a/app/action.c b/app/action.c
index 3f9cb1e..a545898 100644
--- a/app/action.c
+++ b/app/action.c
@@ -156,7 +156,7 @@ void ACTION_Monitor(void)
 	}
 	else
 #endif
-	gRequestDisplayScreen = gScreenToDisplay;
+		gRequestDisplayScreen = gScreenToDisplay;
 }
 
 void ACTION_Scan(bool bRestart)
diff --git a/app/app.c b/app/app.c
index 5f5dc75..0122e83 100644
--- a/app/app.c
+++ b/app/app.c
@@ -72,6 +72,10 @@
 #include "ui/status.h"
 #include "ui/ui.h"
 
+static bool flagSaveVfo;
+static bool flagSaveSettings;
+static bool flagSaveChannel;
+
 static void ProcessKey(KEY_Code_t Key, bool bKeyPressed, bool bKeyHeld);
 
 
@@ -1564,32 +1568,27 @@ static void ProcessKey(KEY_Code_t Key, bool bKeyPressed, bool bKeyHeld)
 	if (gEeprom.AUTO_KEYPAD_LOCK)
 		gKeyLockCountdown = 30;     // 15 seconds
 
-	if (!bKeyPressed) // key released
-	{
-		if (gFlagSaveVfo)
-		{
+	if (!bKeyPressed) { // key released
+		if (flagSaveVfo) {
 			SETTINGS_SaveVfoIndices();
-			gFlagSaveVfo = false;
+			flagSaveVfo = false;
 		}
 
-		if (gFlagSaveSettings)
-		{
+		if (flagSaveSettings) {
 			SETTINGS_SaveSettings();
-			gFlagSaveSettings = false;
+			flagSaveSettings = false;
 		}
 
-		#ifdef ENABLE_FMRADIO
-			if (gFlagSaveFM)
-			{
-				SETTINGS_SaveFM();
-				gFlagSaveFM = false;
-			}
-		#endif
+#ifdef ENABLE_FMRADIO
+		if (gFlagSaveFM) {
+			SETTINGS_SaveFM();
+			gFlagSaveFM = false;
+		}
+#endif
 
-		if (gFlagSaveChannel)
-		{
-			SETTINGS_SaveChannel(gTxVfo->CHANNEL_SAVE, gEeprom.TX_VFO, gTxVfo, gFlagSaveChannel);
-			gFlagSaveChannel = false;
+		if (flagSaveChannel) {
+			SETTINGS_SaveChannel(gTxVfo->CHANNEL_SAVE, gEeprom.TX_VFO, gTxVfo, flagSaveChannel);
+			flagSaveChannel = false;
 
 			RADIO_ConfigureChannel(gEeprom.TX_VFO, VFO_CONFIGURE);
 			RADIO_SetupRegisters(true);
@@ -1597,8 +1596,7 @@ static void ProcessKey(KEY_Code_t Key, bool bKeyPressed, bool bKeyHeld)
 			GUI_SelectNextDisplay(DISPLAY_MAIN);
 		}
 	}
-	else // key pressed or held
-	{
+	else { // key pressed or held
 		const int m = UI_MENU_GetCurrentMenuId();
 		if 	(	//not when PTT and the backlight shouldn't turn on on TX
 				!(Key == KEY_PTT && !(gSetting_backlight_on_tx_rx & BACKLIGHT_ON_TR_TX))
@@ -1609,12 +1607,9 @@ static void ProcessKey(KEY_Code_t Key, bool bKeyPressed, bool bKeyHeld)
 			BACKLIGHT_TurnOn();
 		}
 
-		if (Key == KEY_EXIT && bKeyHeld)
-		{	// exit key held pressed
-
+		if (Key == KEY_EXIT && bKeyHeld) { // exit key held pressed
 			// clear the live DTMF decoder
-			if (gDTMF_RX_live[0] != 0)
-			{
+			if (gDTMF_RX_live[0] != 0) {
 				memset(gDTMF_RX_live, 0, sizeof(gDTMF_RX_live));
 				gDTMF_RX_live_timeout = 0;
 				gUpdateDisplay        = true;
@@ -1634,14 +1629,12 @@ static void ProcessKey(KEY_Code_t Key, bool bKeyPressed, bool bKeyHeld)
 			gMenuCountdown = menu_timeout_500ms;
 
 #ifdef ENABLE_DTMF_CALLING
-		if (gDTMF_DecodeRingCountdown_500ms > 0)
-		{	// cancel the ringing
+		if (gDTMF_DecodeRingCountdown_500ms > 0) { // cancel the ringing
 			gDTMF_DecodeRingCountdown_500ms = 0;
 
 			AUDIO_PlayBeep(BEEP_1KHZ_60MS_OPTIONAL);
 
-			if (Key != KEY_PTT)
-			{
+			if (Key != KEY_PTT) {
 				gPttWasReleased = true;
 				return;
 			}
@@ -1662,14 +1655,11 @@ static void ProcessKey(KEY_Code_t Key, bool bKeyPressed, bool bKeyHeld)
 			return;
 		}
 
-		if (Key == KEY_F)
-		{	// function/key-lock key
-
+		if (Key == KEY_F) { // function/key-lock key
 			if (!bKeyPressed)
 				return;
 
-			if (!bKeyHeld)
-			{	// keypad is locked, tell the user
+			if (!bKeyHeld) { // keypad is locked, tell the user
 				AUDIO_PlayBeep(BEEP_500HZ_60MS_DOUBLE_BEEP_OPTIONAL);
 				gKeypadLocked  = 4;      // 2 seconds
 				gUpdateDisplay = true;
@@ -1694,10 +1684,8 @@ static void ProcessKey(KEY_Code_t Key, bool bKeyPressed, bool bKeyHeld)
 		}
 	}
 
-	if (Key <= KEY_9 || Key == KEY_F)
-	{
-		if (gScanStateDir != SCAN_OFF || gCssBackgroundScan)
-		{	// FREQ/CTCSS/DCS scanning
+	if (Key <= KEY_9 || Key == KEY_F) {
+		if (gScanStateDir != SCAN_OFF || gCssBackgroundScan) { // FREQ/CTCSS/DCS scanning
 			if (bKeyPressed && !bKeyHeld)
 				AUDIO_PlayBeep(BEEP_500HZ_60MS_DOUBLE_BEEP_OPTIONAL);
 			return;
@@ -1705,31 +1693,26 @@ static void ProcessKey(KEY_Code_t Key, bool bKeyPressed, bool bKeyHeld)
 	}
 
 	bool bFlag = false;
-	if (Key == KEY_PTT)
-	{
-		if (gPttWasPressed)
-		{
+	if (Key == KEY_PTT) {
+		if (gPttWasPressed) {
 			bFlag = bKeyHeld;
-			if (!bKeyPressed)
-			{
+			if (!bKeyPressed) {
 				bFlag          = true;
 				gPttWasPressed = false;
 			}
 		}
 	}
-	else if (gPttWasReleased)
-	{
+	else if (gPttWasReleased) {
 		if (bKeyHeld)
 			bFlag = true;
-		if (!bKeyPressed)
-		{
+		if (!bKeyPressed) {
 			bFlag           = true;
 			gPttWasReleased = false;
 		}
 	}
 
-	if (gWasFKeyPressed && (Key == KEY_PTT || Key == KEY_EXIT || Key == KEY_SIDE1 || Key == KEY_SIDE2))
-	{	// cancel the F-key
+	if (gWasFKeyPressed && (Key == KEY_PTT || Key == KEY_EXIT || Key == KEY_SIDE1 || Key == KEY_SIDE2)) { 
+		// cancel the F-key
 		gWasFKeyPressed = false;
 		gUpdateStatus   = true;
 	}
@@ -1745,30 +1728,23 @@ static void ProcessKey(KEY_Code_t Key, bool bKeyPressed, bool bKeyHeld)
 		{
 			char Code;
 
-			if (Key == KEY_PTT)
-			{
+			if (Key == KEY_PTT) {
 				GENERIC_Key_PTT(bKeyPressed);
 				goto Skip;
 			}
 
-			if (Key == KEY_SIDE2)
-			{	// transmit 1750Hz tone
+			if (Key == KEY_SIDE2) { // transmit 1750Hz tone
 				Code = 0xFE;
 			}
-			else
-			{
-
+			else {
 				Code = DTMF_GetCharacter(Key - KEY_0);
 				if (Code == 0xFF)
 					goto Skip;
-
 				// transmit DTMF keys
 			}
 
-			if (!bKeyPressed || bKeyHeld)
-			{
-				if (!bKeyPressed)
-				{
+			if (!bKeyPressed || bKeyHeld) {
+				if (!bKeyPressed) {
 					AUDIO_AudioPathOff();
 
 					gEnableSpeaker = false;
@@ -1781,10 +1757,8 @@ static void ProcessKey(KEY_Code_t Key, bool bKeyPressed, bool bKeyHeld)
 						BK4819_EnableScramble(gCurrentVfo->SCRAMBLING_TYPE - 1);
 				}
 			}
-			else
-			{
-				if (gEeprom.DTMF_SIDE_TONE)
-				{	// user will here the DTMF tones in speaker
+			else {
+				if (gEeprom.DTMF_SIDE_TONE) { // user will here the DTMF tones in speaker
 					AUDIO_AudioPathOn();
 					gEnableSpeaker = true;
 				}
@@ -1808,8 +1782,7 @@ static void ProcessKey(KEY_Code_t Key, bool bKeyPressed, bool bKeyHeld)
 
 			if (Key == KEY_PTT)
 				gPttWasPressed  = true;
-			else
-			if (!bKeyHeld)
+			else if (!bKeyHeld)
 				gPttWasReleased = true;
 		}
 #endif
@@ -1829,14 +1802,12 @@ static void ProcessKey(KEY_Code_t Key, bool bKeyPressed, bool bKeyHeld)
 	}
 
 Skip:
-	if (gBeepToPlay != BEEP_NONE)
-	{
+	if (gBeepToPlay != BEEP_NONE) {
 		AUDIO_PlayBeep(gBeepToPlay);
 		gBeepToPlay = BEEP_NONE;
 	}
 
-	if (gFlagAcceptSetting)
-	{
+	if (gFlagAcceptSetting) {
 		gMenuCountdown = menu_timeout_500ms;
 
 		MENU_AcceptSetting();
@@ -1845,19 +1816,17 @@ Skip:
 		gFlagAcceptSetting  = false;
 	}
 
-	if (gRequestSaveSettings)
-	{
+	if (gRequestSaveSettings) {
 		if (!bKeyHeld)
 			SETTINGS_SaveSettings();
 		else
-			gFlagSaveSettings = 1;
+			flagSaveSettings = 1;
 		gRequestSaveSettings = false;
 		gUpdateStatus        = true;
 	}
 
 #ifdef ENABLE_FMRADIO
-	if (gRequestSaveFM)
-	{
+	if (gRequestSaveFM) {
 		gRequestSaveFM = false;
 		if (!bKeyHeld)
 			SETTINGS_SaveFM();
@@ -1866,28 +1835,24 @@ Skip:
 	}
 #endif
 
-	if (gRequestSaveVFO)
-	{
+	if (gRequestSaveVFO) {
 		gRequestSaveVFO = false;
 		if (!bKeyHeld)
 			SETTINGS_SaveVfoIndices();
 		else
-			gFlagSaveVfo = true;
+			flagSaveVfo = true;
 	}
 
-	if (gRequestSaveChannel > 0) // TODO: remove the gRequestSaveChannel, why use global variable for that??
-	{
-		if (!bKeyHeld)
-		{
+	if (gRequestSaveChannel > 0) { // TODO: remove the gRequestSaveChannel, why use global variable for that??
+		if (!bKeyHeld) {
 			SETTINGS_SaveChannel(gTxVfo->CHANNEL_SAVE, gEeprom.TX_VFO, gTxVfo, gRequestSaveChannel);
 
-			if (!SCANNER_IsScanning())
-				if (gVfoConfigureMode == VFO_CONFIGURE_NONE)  // 'if' is so as we don't wipe out previously setting this variable elsewhere
-					gVfoConfigureMode = VFO_CONFIGURE;
+			if (!SCANNER_IsScanning() && gVfoConfigureMode == VFO_CONFIGURE_NONE)
+				// gVfoConfigureMode is so as we don't wipe out previously setting this variable elsewhere
+				gVfoConfigureMode = VFO_CONFIGURE;
 		}
-		else
-		{
-			gFlagSaveChannel = gRequestSaveChannel;
+		else { // this is probably so settings are not saved when up/down button is held and save is postponed to btn release
+			flagSaveChannel = gRequestSaveChannel;
 
 			if (gRequestDisplayScreen == DISPLAY_INVALID)
 				gRequestDisplayScreen = DISPLAY_MAIN;
@@ -1896,10 +1861,8 @@ Skip:
 		gRequestSaveChannel = 0;
 	}
 
-	if (gVfoConfigureMode != VFO_CONFIGURE_NONE)
-	{
-		if (gFlagResetVfos)
-		{
+	if (gVfoConfigureMode != VFO_CONFIGURE_NONE) {
+		if (gFlagResetVfos) {
 			RADIO_ConfigureChannel(0, gVfoConfigureMode);
 			RADIO_ConfigureChannel(1, gVfoConfigureMode);
 		}
@@ -1914,8 +1877,7 @@ Skip:
 		gFlagResetVfos       = false;
 	}
 
-	if (gFlagReconfigureVfos)
-	{
+	if (gFlagReconfigureVfos) {
 		RADIO_SelectVfos();
 
 #ifdef ENABLE_NOAA
@@ -1940,29 +1902,26 @@ Skip:
 			ACTION_Monitor();   // 1of11
 	}
 
-	if (gFlagRefreshSetting)
-	{
+	if (gFlagRefreshSetting) {
 		gFlagRefreshSetting = false;
 		gMenuCountdown      = menu_timeout_500ms;
 
 		MENU_ShowCurrentSetting();
 	}
 
-	if (gFlagPrepareTX)
-	{
+	if (gFlagPrepareTX) {
 		RADIO_PrepareTX();
 		gFlagPrepareTX = false;
 	}
 
-	#ifdef ENABLE_VOICE
-		if (gAnotherVoiceID != VOICE_ID_INVALID)
-		{
-			if (gAnotherVoiceID < 76)
-				AUDIO_SetVoiceID(0, gAnotherVoiceID);
-			AUDIO_PlaySingleVoice(false);
-			gAnotherVoiceID = VOICE_ID_INVALID;
-		}
-	#endif
+#ifdef ENABLE_VOICE
+	if (gAnotherVoiceID != VOICE_ID_INVALID) {
+		if (gAnotherVoiceID < 76)
+			AUDIO_SetVoiceID(0, gAnotherVoiceID);
+		AUDIO_PlaySingleVoice(false);
+		gAnotherVoiceID = VOICE_ID_INVALID;
+	}
+#endif
 
 	GUI_SelectNextDisplay(gRequestDisplayScreen);
 	gRequestDisplayScreen = DISPLAY_INVALID;
diff --git a/app/main.c b/app/main.c
index 7c2faab..e5e146f 100644
--- a/app/main.c
+++ b/app/main.c
@@ -75,27 +75,17 @@ static void processFKeyFunction(const KEY_Code_t Key, const bool beep)
 {
 	uint8_t Vfo = gEeprom.TX_VFO;
 
-	if (gScreenToDisplay == DISPLAY_MENU)
-	{
-//		if (beep)
-			gBeepToPlay = BEEP_500HZ_60MS_DOUBLE_BEEP_OPTIONAL;
+	if (gScreenToDisplay == DISPLAY_MENU) {
+		gBeepToPlay = BEEP_500HZ_60MS_DOUBLE_BEEP_OPTIONAL;
 		return;
 	}
 	
-//	if (beep)
-		gBeepToPlay = BEEP_1KHZ_60MS_OPTIONAL;
+	gBeepToPlay = BEEP_1KHZ_60MS_OPTIONAL;
 
-	switch (Key)
-	{
+	switch (Key) {
 		case KEY_0:
 			#ifdef ENABLE_FMRADIO
 				ACTION_FM();
-			#else
-
-
-				// TODO: make use of this function key
-
-
 			#endif
 			break;
 
@@ -106,14 +96,12 @@ static void processFKeyFunction(const KEY_Code_t Key, const bool beep)
 				gBeepToPlay     = BEEP_1KHZ_60MS_OPTIONAL;
 
 #ifdef ENABLE_COPY_CHAN_TO_VFO
-				if (!gEeprom.VFO_OPEN || gCssBackgroundScan)
-				{
+				if (!gEeprom.VFO_OPEN || gCssBackgroundScan) {
 					gBeepToPlay = BEEP_500HZ_60MS_DOUBLE_BEEP_OPTIONAL;
 					return;
 				}
 
-				if (gScanStateDir != SCAN_OFF)
-				{
+				if (gScanStateDir != SCAN_OFF) {
 					if (gCurrentFunction != FUNCTION_INCOMING ||
 						gRxReceptionMode == RX_MODE_NONE      ||
 						gScanPauseDelayIn_10ms == 0)
@@ -149,7 +137,6 @@ static void processFKeyFunction(const KEY_Code_t Key, const bool beep)
 					return;
 			}
 #endif
-
 			gTxVfo->Band += 1;
 
 			if (gTxVfo->Band == BAND5_350MHz && !gSetting_350EN) {
@@ -204,13 +191,10 @@ static void processFKeyFunction(const KEY_Code_t Key, const bool beep)
 		case KEY_5:
 			if(beep) {
 #ifdef ENABLE_NOAA
-
-				if (!IS_NOAA_CHANNEL(gTxVfo->CHANNEL_SAVE))
-				{
+				if (!IS_NOAA_CHANNEL(gTxVfo->CHANNEL_SAVE)) {
 					gEeprom.ScreenChannel[Vfo] = gEeprom.NoaaChannel[gEeprom.TX_VFO];
 				}
-				else
-				{
+				else {
 					gEeprom.ScreenChannel[Vfo] = gEeprom.FreqChannel[gEeprom.TX_VFO];
 #ifdef ENABLE_VOICE
 						gAnotherVoiceID = VOICE_ID_FREQUENCY_MODE;
@@ -249,8 +233,7 @@ static void processFKeyFunction(const KEY_Code_t Key, const bool beep)
 			break;
 
 		case KEY_9:
-			if (RADIO_CheckValidChannel(gEeprom.CHAN_1_CALL, false, 0))
-			{
+			if (RADIO_CheckValidChannel(gEeprom.CHAN_1_CALL, false, 0)) {
 				gEeprom.MrChannel[Vfo]     = gEeprom.CHAN_1_CALL;
 				gEeprom.ScreenChannel[Vfo] = gEeprom.CHAN_1_CALL;
 #ifdef ENABLE_VOICE
@@ -279,15 +262,10 @@ static void processFKeyFunction(const KEY_Code_t Key, const bool beep)
 
 static void MAIN_Key_DIGITS(KEY_Code_t Key, bool bKeyPressed, bool bKeyHeld)
 {
-	if (bKeyHeld)
-	{	// key held down
-
-		if (bKeyPressed)
-		{
-			if (gScreenToDisplay == DISPLAY_MAIN)
-			{
-				if (gInputBoxIndex > 0)
-				{	// delete any inputted chars
+	if (bKeyHeld) { // key held down
+		if (bKeyPressed) {
+			if (gScreenToDisplay == DISPLAY_MAIN) {
+				if (gInputBoxIndex > 0) { // delete any inputted chars
 					gInputBoxIndex        = 0;
 					gRequestDisplayScreen = DISPLAY_MAIN;
 				}
@@ -298,7 +276,6 @@ static void MAIN_Key_DIGITS(KEY_Code_t Key, bool bKeyPressed, bool bKeyHeld)
 				processFKeyFunction(Key, false);
 			}
 		}
-
 		return;
 	}
 
@@ -308,22 +285,15 @@ static void MAIN_Key_DIGITS(KEY_Code_t Key, bool bKeyPressed, bool bKeyHeld)
 		return;                                 // don't use the key till it's released
 	}
 
-	if (!gWasFKeyPressed)
-	{	// F-key wasn't pressed
-
+	if (!gWasFKeyPressed) { // F-key wasn't pressed
 		const uint8_t Vfo = gEeprom.TX_VFO;
-
 		gKeyInputCountdown = key_input_timeout_500ms;
-
 		INPUTBOX_Append(Key);
-
 		gRequestDisplayScreen = DISPLAY_MAIN;
 
-		if (IS_MR_CHANNEL(gTxVfo->CHANNEL_SAVE))
-		{	// user is entering channel number
+		if (IS_MR_CHANNEL(gTxVfo->CHANNEL_SAVE)) { // user is entering channel number
 
-			if (gInputBoxIndex != 3)
-			{
+			if (gInputBoxIndex != 3) {
 				#ifdef ENABLE_VOICE
 					gAnotherVoiceID   = (VOICE_ID_t)Key;
 				#endif
@@ -335,8 +305,7 @@ static void MAIN_Key_DIGITS(KEY_Code_t Key, bool bKeyPressed, bool bKeyHeld)
 
 			const uint16_t Channel = ((gInputBox[0] * 100) + (gInputBox[1] * 10) + gInputBox[2]) - 1;
 
-			if (!RADIO_CheckValidChannel(Channel, false, 0))
-			{
+			if (!RADIO_CheckValidChannel(Channel, false, 0)) {
 				gBeepToPlay = BEEP_500HZ_60MS_DOUBLE_BEEP_OPTIONAL;
 				return;
 			}
@@ -363,8 +332,7 @@ static void MAIN_Key_DIGITS(KEY_Code_t Key, bool bKeyPressed, bool bKeyHeld)
 			gAnotherVoiceID = (VOICE_ID_t)Key;
 #endif
 			bool isGigaF = gTxVfo->pRX->Frequency >= _1GHz_in_KHz;
-			if (gInputBoxIndex < 6 + isGigaF)
-			{
+			if (gInputBoxIndex < 6 + isGigaF) {
 				return;
 			}
 
@@ -372,26 +340,20 @@ static void MAIN_Key_DIGITS(KEY_Code_t Key, bool bKeyPressed, bool bKeyHeld)
 			uint32_t Frequency = StrToUL(INPUTBOX_GetAscii()) * 100;
 
 			// clamp the frequency entered to some valid value
-			if (Frequency < frequencyBandTable[0].lower)
-			{
+			if (Frequency < frequencyBandTable[0].lower) {
 				Frequency = frequencyBandTable[0].lower;
 			}
-			else
-			if (Frequency >= BX4819_band1.upper && Frequency < BX4819_band2.lower)
-			{
+			else if (Frequency >= BX4819_band1.upper && Frequency < BX4819_band2.lower) {
 				const uint32_t center = (BX4819_band1.upper + BX4819_band2.lower) / 2;
 				Frequency = (Frequency < center) ? BX4819_band1.upper : BX4819_band2.lower;
 			}
-			else
-			if (Frequency > frequencyBandTable[BAND_N_ELEM - 1].upper)
-			{
+			else if (Frequency > frequencyBandTable[BAND_N_ELEM - 1].upper) {
 				Frequency = frequencyBandTable[BAND_N_ELEM - 1].upper;
 			}
 
 			const FREQUENCY_Band_t band = FREQUENCY_GetBand(Frequency);
 
-			if (gTxVfo->Band != band)
-			{
+			if (gTxVfo->Band != band) {
 				gTxVfo->Band               = band;
 				gEeprom.ScreenChannel[Vfo] = band + FREQ_CHANNEL_FIRST;
 				gEeprom.FreqChannel[Vfo]   = band + FREQ_CHANNEL_FIRST;
@@ -419,8 +381,7 @@ static void MAIN_Key_DIGITS(KEY_Code_t Key, bool bKeyPressed, bool bKeyHeld)
 			else
 			if (IS_NOAA_CHANNEL(gTxVfo->CHANNEL_SAVE))
 			{	// user is entering NOAA channel
-				if (gInputBoxIndex != 2)
-				{
+				if (gInputBoxIndex != 2) {
 					#ifdef ENABLE_VOICE
 						gAnotherVoiceID   = (VOICE_ID_t)Key;
 					#endif
@@ -431,8 +392,7 @@ static void MAIN_Key_DIGITS(KEY_Code_t Key, bool bKeyPressed, bool bKeyHeld)
 				gInputBoxIndex = 0;
 
 				uint8_t Channel = (gInputBox[0] * 10) + gInputBox[1];
-				if (Channel >= 1 && Channel <= ARRAY_SIZE(NoaaFrequencyTable))
-				{
+				if (Channel >= 1 && Channel <= ARRAY_SIZE(NoaaFrequencyTable)) {
 					Channel                   += NOAA_CHANNEL_FIRST;
 					#ifdef ENABLE_VOICE
 						gAnotherVoiceID        = (VOICE_ID_t)Key;
@@ -521,22 +481,16 @@ static void MAIN_Key_EXIT(bool bKeyPressed, bool bKeyHeld)
 
 static void MAIN_Key_MENU(const bool bKeyPressed, const bool bKeyHeld)
 {
-	if (bKeyPressed && !bKeyHeld)
-		// menu key pressed
+	if (bKeyPressed && !bKeyHeld) // menu key pressed
 		gBeepToPlay = BEEP_1KHZ_60MS_OPTIONAL;
 
-	if (bKeyHeld)
-	{	// menu key held down (long press)
-
-		if (bKeyPressed)
-		{	// long press MENU key
+	if (bKeyHeld) { // menu key held down (long press)
+		if (bKeyPressed) { // long press MENU key
 
 			gWasFKeyPressed = false;
 
-			if (gScreenToDisplay == DISPLAY_MAIN)
-			{
-				if (gInputBoxIndex > 0)
-				{	// delete any inputted chars
+			if (gScreenToDisplay == DISPLAY_MAIN) {
+				if (gInputBoxIndex > 0) { // delete any inputted chars
 					gInputBoxIndex        = 0;
 					gRequestDisplayScreen = DISPLAY_MAIN;
 				}
@@ -551,13 +505,11 @@ static void MAIN_Key_MENU(const bool bKeyPressed, const bool bKeyHeld)
 		return;
 	}
 
-	if (!bKeyPressed && !gDTMF_InputMode)
-	{	// menu key released
+	if (!bKeyPressed && !gDTMF_InputMode) { // menu key released
 		const bool bFlag = !gInputBoxIndex;
 		gInputBoxIndex   = 0;
 
-		if (bFlag)
-		{
+		if (bFlag) {
 			if (gScanStateDir != SCAN_OFF) {
 				CHFRSCANNER_Stop();
 				return;
@@ -569,8 +521,7 @@ static void MAIN_Key_MENU(const bool bKeyPressed, const bool bKeyHeld)
 				gAnotherVoiceID   = VOICE_ID_MENU;
 			#endif
 		}
-		else
-		{
+		else {
 			gRequestDisplayScreen = DISPLAY_MAIN;
 		}
 	}
@@ -581,15 +532,13 @@ static void MAIN_Key_STAR(bool bKeyPressed, bool bKeyHeld)
 	if (gCurrentFunction == FUNCTION_TRANSMIT)
 		return;
 	
-	if (gInputBoxIndex)
-	{
+	if (gInputBoxIndex) {
 		if (!bKeyHeld && bKeyPressed)
 			gBeepToPlay = BEEP_500HZ_60MS_DOUBLE_BEEP_OPTIONAL;
 		return;
 	}
 
-	if (bKeyHeld && !gWasFKeyPressed) // long press
-	{	 
+	if (bKeyHeld && !gWasFKeyPressed){ // long press
 		if (!bKeyPressed) // released
 			return; 
 
@@ -599,8 +548,7 @@ static void MAIN_Key_STAR(bool bKeyPressed, bool bKeyHeld)
 		return;
 	}
 
-	if (bKeyPressed) // just pressed
-	{	
+	if (bKeyPressed) { // just pressed
 		return;
 	}
 	
@@ -639,7 +587,6 @@ static void MAIN_Key_STAR(bool bKeyPressed, bool bKeyHeld)
 			return;
 		}				
 #endif
-
 		// scan the CTCSS/DCS code
 		gBackup_CROSS_BAND_RX_TX  = gEeprom.CROSS_BAND_RX_TX;
 		gEeprom.CROSS_BAND_RX_TX = CROSS_BAND_OFF;
@@ -655,58 +602,43 @@ static void MAIN_Key_UP_DOWN(bool bKeyPressed, bool bKeyHeld, int8_t Direction)
 {
 	uint8_t Channel = gEeprom.ScreenChannel[gEeprom.TX_VFO];
 
-	if (bKeyHeld || !bKeyPressed)
-	{
+	if (bKeyHeld || !bKeyPressed) { // key held or released
 		if (gInputBoxIndex > 0)
-			return;
+			return; // leave if input box active
 
-		if (!bKeyPressed)
-		{
-			if (!bKeyHeld)
+		if (!bKeyPressed) {
+			if (!bKeyHeld || IS_FREQ_CHANNEL(Channel))
 				return;
-
-			if (IS_FREQ_CHANNEL(Channel))
-				return;
-
-			#ifdef ENABLE_VOICE
-				AUDIO_SetDigitVoice(0, gTxVfo->CHANNEL_SAVE + 1);
-				gAnotherVoiceID = (VOICE_ID_t)0xFE;
-			#endif
-
+			// if released long button press and not in freq mode
+#ifdef ENABLE_VOICE
+			AUDIO_SetDigitVoice(0, gTxVfo->CHANNEL_SAVE + 1); // say channel number
+			gAnotherVoiceID = (VOICE_ID_t)0xFE;
+#endif
 			return;
 		}
 	}
-	else
-	{
-		if (gInputBoxIndex > 0)
-		{
+	else { // short pressed
+		if (gInputBoxIndex > 0) {
 			gBeepToPlay = BEEP_500HZ_60MS_DOUBLE_BEEP_OPTIONAL;
 			return;
 		}
-
 		gBeepToPlay = BEEP_1KHZ_60MS_OPTIONAL;
 	}
 
-	if (gScanStateDir == SCAN_OFF)
-	{
-		#ifdef ENABLE_NOAA
-			if (!IS_NOAA_CHANNEL(Channel))
-		#endif
+	if (gScanStateDir == SCAN_OFF) {
+#ifdef ENABLE_NOAA
+		if (!IS_NOAA_CHANNEL(Channel))
+#endif
 		{
 			uint8_t Next;
-
-			if (IS_FREQ_CHANNEL(Channel))
-			{	// step/down in frequency
+			if (IS_FREQ_CHANNEL(Channel)) { // step/down in frequency
 				const uint32_t frequency = APP_SetFrequencyByStep(gTxVfo, Direction);
 
-				if (RX_freq_check(frequency) < 0)
-				{	// frequency not allowed
+				if (RX_freq_check(frequency) < 0) { // frequency not allowed
 					gBeepToPlay = BEEP_500HZ_60MS_DOUBLE_BEEP_OPTIONAL;
 					return;
 				}
-
 				gTxVfo->freq_config_RX.Frequency = frequency;
-
 				gRequestSaveChannel = 1;
 				return;
 			}
@@ -714,29 +646,25 @@ static void MAIN_Key_UP_DOWN(bool bKeyPressed, bool bKeyHeld, int8_t Direction)
 			Next = RADIO_FindNextChannel(Channel + Direction, Direction, false, 0);
 			if (Next == 0xFF)
 				return;
-
 			if (Channel == Next)
 				return;
-
-			gEeprom.MrChannel[gEeprom.TX_VFO]     = Next;
+			gEeprom.MrChannel[gEeprom.TX_VFO] = Next;
 			gEeprom.ScreenChannel[gEeprom.TX_VFO] = Next;
 
-			if (!bKeyHeld)
-			{
-				#ifdef ENABLE_VOICE
-					AUDIO_SetDigitVoice(0, Next + 1);
-					gAnotherVoiceID = (VOICE_ID_t)0xFE;
-				#endif
+			if (!bKeyHeld) {
+#ifdef ENABLE_VOICE
+				AUDIO_SetDigitVoice(0, Next + 1);
+				gAnotherVoiceID = (VOICE_ID_t)0xFE;
+#endif
 			}
 		}
-		#ifdef ENABLE_NOAA
-			else
-			{
-				Channel = NOAA_CHANNEL_FIRST + NUMBER_AddWithWraparound(gEeprom.ScreenChannel[gEeprom.TX_VFO] - NOAA_CHANNEL_FIRST, Direction, 0, 9);
-				gEeprom.NoaaChannel[gEeprom.TX_VFO]   = Channel;
-				gEeprom.ScreenChannel[gEeprom.TX_VFO] = Channel;
-			}
-		#endif
+#ifdef ENABLE_NOAA
+		else {
+			Channel = NOAA_CHANNEL_FIRST + NUMBER_AddWithWraparound(gEeprom.ScreenChannel[gEeprom.TX_VFO] - NOAA_CHANNEL_FIRST, Direction, 0, 9);
+			gEeprom.NoaaChannel[gEeprom.TX_VFO] = Channel;
+			gEeprom.ScreenChannel[gEeprom.TX_VFO] = Channel;
+		}
+#endif
 
 		gRequestSaveVFO   = true;
 		gVfoConfigureMode = VFO_CONFIGURE_RELOAD;
@@ -746,24 +674,22 @@ static void MAIN_Key_UP_DOWN(bool bKeyPressed, bool bKeyHeld, int8_t Direction)
 	// jump to the next channel
 	CHFRSCANNER_Start(false, Direction);
 	gScanPauseDelayIn_10ms = 1;
-	gScheduleScanListen    = false;
+	gScheduleScanListen = false;
 
 	gPttWasReleased = true;
 }
 
 void MAIN_ProcessKeys(KEY_Code_t Key, bool bKeyPressed, bool bKeyHeld)
 {
-	#ifdef ENABLE_FMRADIO
-		if (gFmRadioMode && Key != KEY_PTT && Key != KEY_EXIT)
-		{
-			if (!bKeyHeld && bKeyPressed)
-				gBeepToPlay = BEEP_500HZ_60MS_DOUBLE_BEEP_OPTIONAL;
-			return;
-		}
-	#endif
+#ifdef ENABLE_FMRADIO
+	if (gFmRadioMode && Key != KEY_PTT && Key != KEY_EXIT) {
+		if (!bKeyHeld && bKeyPressed)
+			gBeepToPlay = BEEP_500HZ_60MS_DOUBLE_BEEP_OPTIONAL;
+		return;
+	}
+#endif
 
-	if (gDTMF_InputMode && bKeyPressed && !bKeyHeld)
-	{
+	if (gDTMF_InputMode && bKeyPressed && !bKeyHeld) {
 		const char Character = DTMF_GetCharacter(Key);
 		if (Character != 0xFF)
 		{	// add key to DTMF string
@@ -782,18 +708,8 @@ void MAIN_ProcessKeys(KEY_Code_t Key, bool bKeyPressed, bool bKeyHeld)
 //		Key = KEY_SIDE2;      // what's this doing ???
 //	}
 
-	switch (Key)
-	{
-		case KEY_0:
-		case KEY_1:
-		case KEY_2:
-		case KEY_3:
-		case KEY_4:
-		case KEY_5:
-		case KEY_6:
-		case KEY_7:
-		case KEY_8:
-		case KEY_9:
+	switch (Key) {
+		case KEY_0...KEY_9:
 			MAIN_Key_DIGITS(Key, bKeyPressed, bKeyHeld);
 			break;
 		case KEY_MENU:
diff --git a/debugging.h b/debugging.h
index ca554d4..68e44cb 100644
--- a/debugging.h
+++ b/debugging.h
@@ -14,6 +14,16 @@ static inline void LogUart(const char *const str)
 	UART_Send(str, strlen(str));
 }
 
+static inline void LogUartf(const char* format, ...)
+{
+	char buffer[128];
+	va_list va;
+	va_start(va, format);
+	vsnprintf(buffer, (size_t)-1, format, va);
+	va_end(va);
+	UART_Send(buffer, strlen(buffer));
+}
+
 static inline void LogRegUart(uint16_t reg)
 {
 	uint16_t regVal = BK4819_ReadRegister(reg);
diff --git a/misc.c b/misc.c
index 769dffb..653d4fd 100644
--- a/misc.c
+++ b/misc.c
@@ -181,9 +181,6 @@ bool              gFlagPrepareTX;
 bool              gFlagAcceptSetting;
 bool              gFlagRefreshSetting;
 
-bool              gFlagSaveVfo;
-bool              gFlagSaveSettings;
-bool              gFlagSaveChannel;
 #ifdef ENABLE_FMRADIO
 	bool          gFlagSaveFM;
 #endif
diff --git a/misc.h b/misc.h
index 62247ba..0ace215 100644
--- a/misc.h
+++ b/misc.h
@@ -260,9 +260,6 @@ extern bool                  gFlagPrepareTX;
 extern bool                  gFlagAcceptSetting;   // accept menu setting
 extern bool                  gFlagRefreshSetting;  // refresh menu display
 
-extern bool                  gFlagSaveVfo;
-extern bool                  gFlagSaveSettings;
-extern bool                  gFlagSaveChannel;
 #ifdef ENABLE_FMRADIO
 	extern bool              gFlagSaveFM;
 #endif