diff --git a/TEF6686_ESP32.ino b/TEF6686_ESP32.ino
index 8d76872..2baeddb 100644
--- a/TEF6686_ESP32.ino
+++ b/TEF6686_ESP32.ino
@@ -17,7 +17,6 @@
 #include "src/FREQFONT.h"
 #include "src/TEF6686.h"
 #include "src/constants.h"
-#include "src/config.h"
 #include "src/language.h"
 #include "src/gui.h"
 #include "src/comms.h"
@@ -35,6 +34,7 @@
 #define STANDBYLED      19
 #define SMETERPIN       27
 
+// #define CHINA_PORTABLE      // uncomment for China Portable build (Simplified Chinese)
 #define DYNAMIC_SPI_SPEED   // uncomment to enable dynamic SPI Speed https://github.com/ohmytime/TFT_eSPI_DynamicSpeed
 
 #ifdef ARS
@@ -82,9 +82,6 @@ bool memtune;
 bool menu;
 bool menuopen;
 bool mwstepsize;
-#ifdef HAS_AIR_BAND
-bool airstepsize;
-#endif
 bool nobattery;
 bool optenc;
 bool rdsflagreset;
@@ -338,11 +335,6 @@ unsigned int frequency_MIBand_75M;
 unsigned int frequency_MIBand_90M;
 unsigned int frequency_MW;
 unsigned int frequency_SW;
-#ifdef HAS_AIR_BAND
-unsigned int frequency_AIR;
-unsigned int AIRHighEdgeSet;
-unsigned int AIRLowEdgeSet;
-#endif
 unsigned int frequencyold;
 unsigned int HighEdgeOIRTSet;
 unsigned int HighEdgeSet;
@@ -453,9 +445,6 @@ void setup() {
   frequency_LW = EEPROM.readUInt(EE_UINT16_FREQUENCY_LW);
   frequency_MW = EEPROM.readUInt(EE_UINT16_FREQUENCY_MW);
   frequency_SW = EEPROM.readUInt(EE_UINT16_FREQUENCY_SW);
-#ifdef HAS_AIR_BAND
-  frequency_AIR = EEPROM.readUInt(EE_UINT16_FREQUENCY_AIR);
-#endif
   XDRGTK_key = EEPROM.readString(EE_STRING_XDRGTK_KEY);
   usesquelch = EEPROM.readByte(EE_BYTE_USESQUELCH);
   showmodulation = EEPROM.readByte(EE_BYTE_SHOWMODULATION);
@@ -486,9 +475,6 @@ void setup() {
   radio.rds.fastps = EEPROM.readByte(EE_BYTE_FASTPS);
   tot = EEPROM.readByte(EE_BYTE_TOT);
   mwstepsize = EEPROM.readByte(EE_BYTE_MWREGION);
-#ifdef HAS_AIR_BAND
-  airstepsize = EEPROM.readByte(EE_BYTE_AIRSTEPSIZE);
-#endif
   spispeed = EEPROM.readByte(EE_BYTE_SPISPEED);
   amscansens = EEPROM.readByte(EE_BYTE_AMSCANSENS);
   fmscansens = EEPROM.readByte(EE_BYTE_FMSCANSENS);
@@ -760,10 +746,12 @@ void setup() {
   radio.setVolume(VolSet);
   radio.setOffset(LevelOffset);
   radio.setAMOffset(AMLevelOffset);
-  if (band > BAND_GAP && band != BAND_AIR) {
+
+  if (band > BAND_GAP) {
     radio.setAMCoChannel(amcodect, amcodectcount);
     radio.setAMAttenuation(amgain);
   }
+
   radio.setStereoLevel(StereoLevel);
   radio.setHighCutLevel(HighCutLevel);
   radio.setHighCutOffset(HighCutOffset);
@@ -1264,145 +1252,23 @@ void doBandSelectionFM() {
   }
 }
 
-void CheckBandForbiddenAM() {
-#ifdef HAS_AIR_BAND
+void CheckBandForbiddenAM () {
   switch (band) {
     case BAND_LW:
-      if (bandAM == AM_BAND_MW_SW_AIR || bandAM == AM_BAND_MW_SW || bandAM == AM_BAND_MW_AIR || bandAM == AM_BAND_SW_AIR || bandAM == AM_BAND_MW || bandAM == AM_BAND_SW || bandAM == AM_BAND_AIR)
-        bandforbidden = 1;
-      else
-        bandforbidden = 0;
+      if (bandAM == AM_BAND_MW_SW || bandAM == AM_BAND_MW || bandAM == AM_BAND_SW) bandforbidden = 1; else bandforbidden = 0;
       break;
     case BAND_MW:
-      if (bandAM == AM_BAND_LW_SW_AIR || bandAM == AM_BAND_LW_SW || bandAM == AM_BAND_LW_AIR || bandAM == AM_BAND_SW_AIR || bandAM == AM_BAND_LW || bandAM == AM_BAND_SW || bandAM == AM_BAND_AIR)
-        bandforbidden = 1;
-      else
-        bandforbidden = 0;
+      if (bandAM == AM_BAND_LW_SW || bandAM == AM_BAND_LW || bandAM == AM_BAND_SW) bandforbidden = 1; else bandforbidden = 0;
       break;
     case BAND_SW:
-      if (bandAM == AM_BAND_LW_MW_AIR || bandAM == AM_BAND_LW_MW || bandAM == AM_BAND_LW_AIR || bandAM == AM_BAND_MW_AIR || bandAM == AM_BAND_LW || bandAM == AM_BAND_MW || bandAM == AM_BAND_AIR)
-        bandforbidden = 1;
-      else
-        bandforbidden = 0;
-      break;
-    case BAND_AIR:
-      if (bandAM == AM_BAND_LW_MW_SW || bandAM == AM_BAND_LW_MW || bandAM == AM_BAND_LW_SW || bandAM == AM_BAND_MW_SW || bandAM == AM_BAND_LW || bandAM == AM_BAND_MW || bandAM == AM_BAND_SW)
-        bandforbidden = 1;
-      else
-        bandforbidden = 0;
+      if (bandAM == AM_BAND_LW_MW || bandAM == AM_BAND_LW || bandAM == AM_BAND_MW) bandforbidden = 1; else bandforbidden = 0;
       break;
   }
-#else
-  switch (band) {
-    case BAND_LW:
-      if (bandAM == AM_BAND_MW_SW || bandAM == AM_BAND_MW || bandAM == AM_BAND_SW) bandforbidden = 1;
-      else bandforbidden = 0;
-      break;
-    case BAND_MW:
-      if (bandAM == AM_BAND_LW_SW || bandAM == AM_BAND_LW || bandAM == AM_BAND_SW) bandforbidden = 1;
-      else bandforbidden = 0;
-      break;
-    case BAND_SW:
-      if (bandAM == AM_BAND_LW_MW || bandAM == AM_BAND_LW || bandAM == AM_BAND_MW) bandforbidden = 1;
-      else bandforbidden = 0;
-      break;
-  }
-#endif
 }
 
 void doBandSelectionAM() {
   if (band < BAND_GAP) return;
 
-#ifdef HAS_AIR_BAND  // has air band
-  switch (bandAM) {
-    case AM_BAND_ALL:
-      break;
-    case AM_BAND_LW_MW_SW:
-      if (band == BAND_AIR) {
-        band = BAND_LW;
-        SelectBand();
-      }
-      break;
-    case AM_BAND_LW_MW_AIR:
-      if (band == BAND_SW) {
-        band = BAND_LW;
-        SelectBand();
-      }
-      break;
-    case AM_BAND_LW_SW_AIR:
-      if (band == BAND_MW) {
-        band = BAND_LW;
-        SelectBand();
-      }
-      break;
-    case AM_BAND_MW_SW_AIR:
-      if (band == BAND_LW) {
-        band = BAND_MW;
-        SelectBand();
-      }
-      break;
-    case AM_BAND_LW_MW:
-      if (band == BAND_SW || band == BAND_AIR) {
-        band = BAND_LW;
-        SelectBand();
-      }
-      break;
-    case AM_BAND_LW_SW:
-      if (band == BAND_MW || band == BAND_AIR) {
-        band = BAND_LW;
-        SelectBand();
-      }
-      break;
-    case AM_BAND_LW_AIR:
-      if (band == BAND_MW || band == BAND_SW) {
-        band = BAND_LW;
-        SelectBand();
-      }
-      break;
-    case AM_BAND_MW_SW:
-      if (band == BAND_LW || band == BAND_AIR) {
-        band = BAND_MW;
-        SelectBand();
-      }
-      break;
-    case AM_BAND_MW_AIR:
-      if (band == BAND_LW || band == BAND_SW) {
-        band = BAND_MW;
-        SelectBand();
-      }
-      break;
-    case AM_BAND_SW_AIR:
-      if (band == BAND_LW || band == BAND_MW) {
-        band = BAND_SW;
-        SelectBand();
-      }
-      break;
-    case AM_BAND_LW:
-      if (band != BAND_LW) {
-        band = BAND_LW;
-        SelectBand();
-      }
-      break;
-    case AM_BAND_MW:
-      if (band != BAND_MW) {
-        band = BAND_MW;
-        SelectBand();
-      }
-      break;
-    case AM_BAND_SW:
-      if (band != BAND_SW) {
-        band = BAND_SW;
-        SelectBand();
-      }
-      break;
-    case AM_BAND_AIR:
-      if (band != BAND_AIR) {
-        band = BAND_AIR;
-        SelectBand();
-      }
-      break;
-  }
-#else  // has no air band
   switch (bandAM) {
     case AM_BAND_ALL:
       break;
@@ -1447,30 +1313,17 @@ void doBandSelectionAM() {
       SelectBand();
       break;
   }
-#endif
 }
 
 void AMjumptoFM() {
   if (bandFM != FM_BAND_NONE) {
     if (bandFM == FM_BAND_FM) band = BAND_FM; else band = BAND_OIRT;
   } else {
-    FMjumptoAM();
+    // do nothing
   }
 }
 
 void FMjumptoAM() {
-#ifdef HAS_AIR_BAND
-  if (bandAM == AM_BAND_ALL || bandAM == AM_BAND_LW_MW_AIR || bandAM == AM_BAND_LW_SW_AIR || bandAM == AM_BAND_LW_MW || bandAM == AM_BAND_LW_SW || bandAM == AM_BAND_LW_AIR || bandAM == AM_BAND_LW) {
-    band = BAND_LW;
-    if (stepsize > 3) stepsize = 3;
-  } else if (bandAM == AM_BAND_MW_SW || bandAM == AM_BAND_MW_AIR || bandAM == AM_BAND_MW) {
-    band = BAND_MW;
-  } else if (bandAM == AM_BAND_SW_AIR || bandAM == AM_BAND_SW) {
-    band = BAND_SW;
-  } else if (bandAM == AM_BAND_AIR) {
-    band = BAND_AIR;
-  }
-#else
   if (bandAM == AM_BAND_ALL || bandAM == AM_BAND_LW_MW || bandAM == AM_BAND_LW_SW || bandAM == AM_BAND_LW) {
     band = BAND_LW;
     if (stepsize > 3) stepsize = 3;
@@ -1479,43 +1332,10 @@ void FMjumptoAM() {
   } else if (bandAM == AM_BAND_SW) {
     band = BAND_SW;
   }
-#endif
 }
 
 void ToggleBand(byte nowBand) {
   switch (nowBand) {
-#ifdef HAS_AIR_BAND
-    case BAND_LW:
-      if (bandAM == AM_BAND_LW_MW_SW || bandAM == AM_BAND_LW_MW_AIR || bandAM == AM_BAND_LW_MW || bandAM == AM_BAND_ALL) {
-        band = BAND_MW;
-      } else if (bandAM == AM_BAND_LW_SW_AIR || bandAM == AM_BAND_LW_SW) {
-        band = BAND_SW;
-      } else if (bandAM == AM_BAND_LW_MW_AIR || bandAM == AM_BAND_LW_SW_AIR || bandAM == AM_BAND_LW_AIR) {
-        band = BAND_AIR;
-      } else if (bandAM == AM_BAND_LW || bandAM == AM_BAND_NONE) {
-        AMjumptoFM();
-      }
-      break;
-    case BAND_MW:
-      if (bandAM == AM_BAND_LW_MW_SW || bandAM == AM_BAND_MW_SW_AIR || bandAM == AM_BAND_MW_SW || bandAM == AM_BAND_ALL) {
-        band = BAND_SW;
-      } else if (bandAM == AM_BAND_LW_MW_AIR || bandAM == AM_BAND_MW_AIR) {
-        band = BAND_AIR;
-      } else if (bandAM == AM_BAND_MW || bandAM == AM_BAND_NONE) {
-        AMjumptoFM();
-      }
-      break;
-    case BAND_SW:
-      if (bandAM == AM_BAND_LW_SW_AIR || bandAM == AM_BAND_MW_SW_AIR || bandAM == AM_BAND_SW_AIR || bandAM == AM_BAND_ALL) {
-        band = BAND_AIR;
-      } else if (bandAM == AM_BAND_LW_MW_SW || bandAM == AM_BAND_LW_SW || bandAM == AM_BAND_MW_SW || bandAM == AM_BAND_SW || bandAM == AM_BAND_NONE) {
-        AMjumptoFM();
-      }
-      break;
-    case BAND_AIR:
-      AMjumptoFM();
-      break;
-#else  // has no air band
     case BAND_LW:
       if (bandAM == AM_BAND_LW_MW || bandAM == AM_BAND_ALL) {
         band = BAND_MW;
@@ -1540,9 +1360,8 @@ void ToggleBand(byte nowBand) {
       break;
     case BAND_SW:
       if (bandFM != FM_BAND_NONE) {
-        if (bandFM == FM_BAND_FM) band = BAND_FM;
-        else band = BAND_OIRT;
-      } else { // FM be disabled
+        if (bandFM == FM_BAND_FM) band = BAND_FM; else band = BAND_OIRT;
+      } else {
         if (bandAM == AM_BAND_LW_SW || bandAM == AM_BAND_ALL) {
           band = BAND_LW;
         } else if (bandAM == AM_BAND_MW_SW) {
@@ -1552,7 +1371,6 @@ void ToggleBand(byte nowBand) {
         }
       }
       break;
-#endif
     case BAND_OIRT:
       if (bandFM == FM_BAND_ALL || bandFM == FM_BAND_FM) {
         band = BAND_FM;
@@ -1654,13 +1472,10 @@ void StoreFrequency() {
   EEPROM.writeUInt(EE_UINT16_FREQUENCY_LW, frequency_LW);
   EEPROM.writeUInt(EE_UINT16_FREQUENCY_MW, frequency_MW);
   EEPROM.writeUInt(EE_UINT16_FREQUENCY_SW, frequency_SW);
-#ifdef HAS_AIR_BAND
-  EEPROM.writeUInt(EE_UINT16_FREQUENCY_AIR, frequency_AIR);
-#endif
   EEPROM.commit();
 }
 
-void LimitAMFrequency() {//todo air
+void LimitAMFrequency() {
   switch (band) {
     case BAND_LW:
       frequency_AM = frequency_LW;
@@ -2038,23 +1853,10 @@ void SelectBand() {
       case BAND_LW: freqold = frequency_LW; frequency_AM = frequency_LW; break;
       case BAND_MW: freqold = frequency_MW; frequency_AM = frequency_MW; break;
       case BAND_SW: freqold = frequency_SW; frequency_AM = frequency_SW; break;
-#ifdef HAS_AIR_BAND      
-      case BAND_AIR: freqold = frequency_AIR; frequency_AM = frequency_AIR;break;
-#endif
     }
     LimitAMFrequency();
     if (!externaltune) CheckBandForbiddenAM();
-#ifdef HAS_AIR_BAND
-    if (band == BAND_AIR) {
-      radio.SetFreqAIR(10700);
-      log_d("BAND SELECT -> 航空的频率: %d",frequency_AIR);
-    } else {
-      radio.SetFreqAM(frequency_AM);
-    }
-#else
     radio.SetFreqAM(frequency_AM);
-#endif
-    log_d("BAND SELECT -> 现在的频率: %d",frequency_AM);
     radio.setAMAttenuation(amgain);
     radio.setAMCoChannel(amcodect, amcodectcount);
     doBW();
@@ -2074,11 +1876,7 @@ void SelectBand() {
       tftPrint(0, "iMS", 265, 59, GreyoutColor, BackgroundColor, 16);
       tft.drawRoundRect(286, 56, 32, 20, 5, GreyoutColor);
       tftPrint(0, "EQ", 303, 59, GreyoutColor, BackgroundColor, 16);
-      // todo
-      // if (band == AM_BAND_AIR) tftPrint(-1, "MHz", 258, 76, ActiveColor, ActiveColorSmooth, 28);
-      // else tftPrint(-1, "KHz", 258, 76, ActiveColor, ActiveColorSmooth, 28);
     }
-    log_d("BAND SELECT -> 现在的波段: %d",band);
   } else {
     if (tunemode == TUNE_MI_BAND) tunemode = TUNE_MAN;
     radio.power(0);
@@ -2313,7 +2111,7 @@ void Round5K(unsigned int freqAM) {
   }
 }
 
-void RoundStep() {//todo air
+void RoundStep() {
   if (band == BAND_FM) {
     unsigned int freq = frequency;
     switch (fmdefaultstepsize) {
@@ -2368,7 +2166,7 @@ void ButtonPress() {
           EEPROM.writeByte(memorypos + EE_PRESETS_BAND_START, band);
           EEPROM.writeByte(memorypos + EE_PRESET_BW_START, BWset);
           EEPROM.writeByte(memorypos + EE_PRESET_MS_START, StereoToggle);
-          if (band == BAND_FM) {//todo air
+          if (band == BAND_FM) {
             EEPROM.writeUInt((memorypos * 4) + EE_PRESETS_FREQUENCY_START, frequency);
           } else if (band == BAND_OIRT) {
             EEPROM.writeUInt((memorypos * 4) + EE_PRESETS_FREQUENCY_START, frequency_OIRT);
@@ -2402,7 +2200,7 @@ void ButtonPress() {
 
           EEPROM.commit();
 
-          if (band == BAND_FM) {//todo air
+          if (band == BAND_FM) {
             presets[memorypos].frequency = frequency;
           } else if (band == BAND_OIRT) {
             presets[memorypos].frequency = frequency_OIRT;
@@ -2708,36 +2506,22 @@ void DoMemoryPosTune() {
     band = presets[memorypos].band;
   }
 
-  switch (band) {
-    case BAND_FM:
-      frequency = presets[memorypos].frequency;
-      radio.SetFreq(frequency);
-      break;
-    case BAND_OIRT:
-      frequency = presets[memorypos].frequency;
-      radio.SetFreq(frequency_OIRT);
-      break;
-    case BAND_LW:
-      frequency = presets[memorypos].frequency;
-      radio.SetFreq(frequency_LW);
-      break;
-    case BAND_MW:
-      frequency = presets[memorypos].frequency;
-      radio.SetFreq(frequency_MW);
-      break;
-    case BAND_SW:
-      frequency = presets[memorypos].frequency;
-      radio.SetFreq(frequency_SW);
-      break;
-#ifdef HAS_AIR_BAND
-    case BAND_AIR:
-      frequency = presets[memorypos].frequency;
-      // radio.SetFreq(frequency_AIR); // todo
-      radio.SetFreqAM(10700); // todo
-      break;
-#endif
+  if (band == BAND_FM) {
+    frequency = presets[memorypos].frequency;
+    radio.SetFreq(frequency);
+  } else if (band == BAND_OIRT) {
+    frequency_OIRT = presets[memorypos].frequency;
+    radio.SetFreq(frequency_OIRT);
+  } else if (band == BAND_LW) {
+    frequency_LW = presets[memorypos].frequency;
+    radio.SetFreqAM(frequency_LW);
+  } else if (band == BAND_MW) {
+    frequency_MW = presets[memorypos].frequency;
+    radio.SetFreqAM(frequency_MW);
+  } else if (band == BAND_SW) {
+    frequency_SW = presets[memorypos].frequency;
+    radio.SetFreqAM(frequency_SW);
   }
-
   ShowFreq(0);
 
   if (band == BAND_FM || band == BAND_OIRT) {
@@ -2809,9 +2593,6 @@ void ShowFreq(int mode) {
       case BAND_LW: frequency_AM = frequency_LW; break;
       case BAND_MW: frequency_AM = frequency_MW; break;
       case BAND_SW: frequency_AM = frequency_SW; break;
-#ifdef HAS_AIR_BAND
-      case BAND_AIR: frequency_AM = frequency_AIR; break; // todo air
-#endif
     }
 
     if (!screenmute) {
@@ -2828,11 +2609,7 @@ void ShowFreq(int mode) {
 
       FrequencySprite.setTextDatum(TR_DATUM);
       FrequencySprite.setTextColor(FreqColor, FreqColorSmooth, false);
-      if (band == BAND_AIR) {
-        FrequencySprite.drawString(String(frequency_AM / 1000) + "." + String(frequency_AM % 1000) + " ", 218, -6);
-      } else {
-        FrequencySprite.drawString(String(frequency_AM) + " ", 218, -6);
-      }
+      FrequencySprite.drawString(String(frequency_AM) + " ", 218, -6);
       FrequencySprite.unloadFont();
       FrequencySprite.setTextColor(PrimaryColor, PrimaryColorSmooth, false);
       FrequencySprite.setTextDatum(TL_DATUM);
@@ -3294,7 +3071,7 @@ void doSquelch() {
   SquelchSprite.unloadFont();
 }
 
-void updateBW() {//todo air
+void updateBW() {
   if (BWset == 0) {
     if (!screenmute && !advancedRDS && !afscreen) {
       tft.drawRoundRect(248, 35, 71, 20, 5, ActiveColor);
@@ -3346,8 +3123,7 @@ void updateEQ() {
 }
 
 void updateCodetect() {
-  if (
-    band > BAND_GAP && band != BAND_AIR) {
+  if (band > BAND_GAP) {
     if (WAM) {
       tftPrint(-1, "CO", 50, 61, PrimaryColor, PrimaryColorSmooth, 16);
     } else {
@@ -3657,18 +3433,10 @@ void TuneUp() {
       } else if (frequency_AM < MWLowEdgeSet) {
         temp = FREQ_MW_STEP_9K;
         frequency_AM = (frequency_AM / FREQ_MW_STEP_9K) * FREQ_MW_STEP_9K;
-      } else if (frequency_AM < SWHighEdgeSet && frequency_AM > SWLowEdgeSet) {
+      } else {
         temp = FREQ_SW_STEP_5K;
         frequency_AM = (frequency_AM / FREQ_SW_STEP_5K) * FREQ_SW_STEP_5K;
       }
-#ifdef HAS_AIR_BAND
-      else if (frequency_AM < AIRHighEdgeSet && frequency_AM > AIRLowEdgeSet) {
-        
-        if (airstepsize == 0) temp = FREQ_AIR_STEP_25K;
-        else temp = FREQ_AIR_STEP_8K33;
-        log_d("tune up airband stepsize = %d",airstepsize);
-      }
-#endif
     } else {
       if (band == BAND_OIRT) {
         temp = FREQ_OIRT_STEP_30K;
@@ -3733,18 +3501,6 @@ void TuneUp() {
     radio.SetFreqAM(frequency_AM);
     frequency_SW = frequency_AM;
   }
-#ifdef HAS_AIR_BAND
-  else if (band == BAND_AIR) {
-    log_d("tune up airband = %d",frequency_AM);
-    frequency_AM += temp;
-    if (frequency_AIR > AIRHighEdgeSet) {
-      frequency_AM = AIRLowEdgeSet;
-      if (edgebeep) EdgeBeeper();
-    }
-    radio.SetFreqAM(frequency_AM);
-    frequency_AIR = frequency_AM;
-  }
-#endif
   radio.clearRDS(fullsearchrds);
   if (RDSSPYUSB) Serial.print("G:\r\nRESET-------\r\n\r\n");
   if (RDSSPYTCP) RemoteClient.print("G:\r\nRESET-------\r\n\r\n");
@@ -4003,9 +3759,6 @@ void DefaultSettings(byte userhardwaremodel) {
   if (userhardwaremodel == BASE_ILI9341) EEPROM.writeUInt(EE_UINT16_FREQUENCY_LW, 180); else EEPROM.writeUInt(EE_UINT16_FREQUENCY_LW, 164);
   if (userhardwaremodel == BASE_ILI9341) EEPROM.writeUInt(EE_UINT16_FREQUENCY_MW, 540); else EEPROM.writeUInt(EE_UINT16_FREQUENCY_MW, 639);
   if (userhardwaremodel == BASE_ILI9341) EEPROM.writeUInt(EE_UINT16_FREQUENCY_SW, 1800); else EEPROM.writeUInt(EE_UINT16_FREQUENCY_SW, 5000);
-#ifdef HAS_AIR_BAND
-  EEPROM.writeUInt(EE_UINT16_FREQUENCY_AIR, 135350);
-#endif
   EEPROM.writeString(EE_STRING_XDRGTK_KEY, "password");
   if (userhardwaremodel == BASE_ILI9341) EEPROM.writeByte(EE_BYTE_USESQUELCH, 1); else EEPROM.writeByte(EE_BYTE_USESQUELCH, 0);
   EEPROM.writeByte(EE_BYTE_SHOWMODULATION, 1);
@@ -4037,9 +3790,6 @@ void DefaultSettings(byte userhardwaremodel) {
   EEPROM.writeByte(EE_BYTE_FASTPS, 1);
   EEPROM.writeByte(EE_BYTE_TOT, 0);
   EEPROM.writeByte(EE_BYTE_MWREGION, 0);
-#ifdef HAS_AIR_BAND
-  EEPROM.writeByte(EE_BYTE_AIRSTEPSIZE, 0);
-#endif
   EEPROM.writeByte(EE_BYTE_SPISPEED, 0);
   EEPROM.writeByte(EE_BYTE_AMSCANSENS, 4);
   EEPROM.writeByte(EE_BYTE_FMSCANSENS, 4);
@@ -4266,9 +4016,6 @@ void endMenu() {
   EEPROM.writeByte(EE_BYTE_FASTPS, radio.rds.fastps);
   EEPROM.writeByte(EE_BYTE_TOT, tot);
   EEPROM.writeByte(EE_BYTE_MWREGION, mwstepsize);
-#ifdef HAS_AIR_BAND
-  EEPROM.writeByte(EE_BYTE_AIRSTEPSIZE, airstepsize);
-#endif
   EEPROM.writeByte(EE_BYTE_SPISPEED, spispeed);
   EEPROM.writeByte(EE_BYTE_AMSCANSENS, amscansens);
   EEPROM.writeByte(EE_BYTE_FMSCANSENS, fmscansens);
diff --git a/src/TEF6686.cpp b/src/TEF6686.cpp
index 2a084dd..1327463 100644
--- a/src/TEF6686.cpp
+++ b/src/TEF6686.cpp
@@ -135,16 +135,16 @@ void TEF6686::init(byte TEF) {
 
     if (xtalADC < XTAL_0V_ADC + XTAL_ADC_TOL) {
       Tuner_Init(tuner_init_tab9216);
-      log_d("TEF668X XTAL : 9.216M");
+      log_v("XTAL : 9.216M");
     } else if (xtalADC > XTAL_1V_ADC - XTAL_ADC_TOL && xtalADC < XTAL_1V_ADC + XTAL_ADC_TOL) {
       Tuner_Init(tuner_init_tab12000);
-      log_d("TEF668X XTAL : 12M");
+      log_v("XTAL : 12M");
     } else if (xtalADC > XTAL_2V_ADC - XTAL_ADC_TOL && xtalADC < XTAL_2V_ADC + XTAL_ADC_TOL) {
       Tuner_Init(tuner_init_tab55000);
-      log_d("TEF668X XTAL : 55M");
+      log_v("XTAL : 55M");
     } else {
       Tuner_Init(tuner_init_tab4000);
-      log_d("TEF668X XTAL : 4M");
+      log_v("XTAL : 4M");
     }
     power(1);
     Tuner_Init(tuner_init_tab);
@@ -178,10 +178,6 @@ void TEF6686::SetFreqAM(uint16_t frequency) {
   devTEF_Radio_Tune_AM (frequency);
 }
 
-void TEF6686::SetFreqAIR(uint16_t frequency) {
-  devTEF_Radio_Tune_AM (10700);
-}
-
 void TEF6686::setOffset(int8_t offset) {
   devTEF_Radio_Set_LevelOffset(offset * 10);
 }
diff --git a/src/TEF6686.h b/src/TEF6686.h
index 2d461ef..ec33c13 100644
--- a/src/TEF6686.h
+++ b/src/TEF6686.h
@@ -660,7 +660,6 @@ class TEF6686 {
     void readRDS(byte showrdserrors);
     void SetFreq(uint16_t frequency);
     void SetFreqAM(uint16_t frequency);
-    void SetFreqAIR(uint16_t frequency);
     bool getProcessing(uint16_t &highcut, uint16_t &stereo, uint16_t &sthiblend, uint8_t &stband_1, uint8_t &stband_2, uint8_t &stband_3, uint8_t &stband_4);
     bool getStatus(int16_t &level, uint16_t &USN, uint16_t &WAM, int16_t &offset, uint16_t &bandwidth, uint16_t &modulation, int8_t &snr);
     bool getStatusAM(int16_t &level, uint16_t &noise, uint16_t &cochannel, int16_t &offset, uint16_t &bandwidth, uint16_t &modulation, int8_t &snr);
diff --git a/src/config.h b/src/config.h
deleted file mode 100644
index 53da484..0000000
--- a/src/config.h
+++ /dev/null
@@ -1,9 +0,0 @@
-#ifndef CONFIG_H
-#define CONFIG_H
-
-#include <Arduino.h>
-
-// #define HAS_AIR_BAND        // uncomment to enable Air Band(Make sure you have Air Band extend board)
-#define CHINA_PORTABLE      // uncomment for China Portable build (Simplified Chinese)
-
-#endif
\ No newline at end of file
diff --git a/src/constants.h b/src/constants.h
index cfd6202..43c9266 100644
--- a/src/constants.h
+++ b/src/constants.h
@@ -1,5 +1,3 @@
-#include "config.h"
-
 #define ON                         1
 #define OFF                        0
 #define REVERSE                    false
@@ -35,10 +33,6 @@
 #define FREQ_MW_STEP_9K             9
 #define FREQ_MW_STEP_10K            10
 #define FREQ_SW_STEP_5K             5
-#ifdef HAS_AIR_BAND
-#define FREQ_AIR_STEP_25K           25
-#define FREQ_AIR_STEP_8K33          8.33
-#endif
 #define FREQ_OIRT_STEP_30K          3
 #define FREQ_FM_STEP_50K            5
 #define FREQ_FM_STEP_100K           10
@@ -54,10 +48,6 @@
 #define FREQ_SW_LOW_EDGE_MAX        (FREQ_SW_160M_START)
 #define FREQ_SW_HIGH_EDGE_MIN       (FREQ_SW_11M_END)
 #define FREQ_SW_HIGH_EDGE_MAX       (FREQ_SW_END)
-#ifdef HAS_AIR_BAND
-#define FREQ_AIR_LOW_EDGE_MIN       108000
-#define FREQ_AIR_HIGH_EDGE_MIN      137000
-#endif
 #define FREQ_FM_START               65000
 #define FREQ_FM_END                 108000
 #define FREQ_FM_OIRT_START          6500   // use values of 1/10 * kHz
@@ -206,13 +196,9 @@
 
 // EEPROM index defines
 #define EE_PRESETS_CNT              99    // When set > 99 change the complete EEPROM adressing!
-#define EE_CHECKBYTE_VALUE          10     // 0 ~ 255,add new entry, change for new value
+#define EE_CHECKBYTE_VALUE          7     // 0 ~ 255,add new entry, change for new value
 #define EE_PRESETS_FREQUENCY        0     // Default value when memory channel should be skipped!
-#ifdef HAS_AIR_BAND
-#define EE_TOTAL_CNT                2219  // Total occupied eeprom bytes
-#else
 #define EE_TOTAL_CNT                2214  // Total occupied eeprom bytes
-#endif
 
 #define EE_PRESETS_BAND_START       0     // 99 * 1 byte
 #define EE_PRESET_BW_START          99    // 99 * 1 byte
@@ -310,10 +296,6 @@
 #define EE_BYTE_SCANMEM             2211
 #define EE_BYTE_SCANCANCEL          2212
 #define EE_BYTE_SCANMUTE            2213
-#ifdef HAS_AIR_BAND
-#define EE_BYTE_AIRSTEPSIZE         2114
-#define EE_UINT16_FREQUENCY_AIR     2215
-#endif
 // End of EEPROM index defines
 
 static const char* const unitString[] = {"dBμV", "dBf", "dBm"};
@@ -337,28 +319,15 @@ enum SCAN_CANCEL {
 
 // FM band: before BAND_GAP; AM band: after BAND_GAP
 enum RADIO_BAND {
-  BAND_OIRT = 0, BAND_FM, BAND_GAP, BAND_LW, BAND_MW, BAND_SW, BAND_AIR
+  BAND_OIRT = 0, BAND_FM, BAND_GAP, BAND_LW, BAND_MW, BAND_SW
 };
 
-#ifndef HAS_AIR_BAND
 // Toggle: LW -> MW -> SW
 enum RADIO_AM_BAND_SELECTION {
   AM_BAND_ALL = 0, AM_BAND_LW_MW, AM_BAND_LW_SW, AM_BAND_MW_SW,
   AM_BAND_LW, AM_BAND_MW, AM_BAND_SW, AM_BAND_NONE,
   AM_BAND_CNT
 };
-#else
-// Toggle: LW -> MW -> SW -> AIR
-enum RADIO_AM_BAND_SELECTION {
-  AM_BAND_ALL = 0,
-  AM_BAND_LW_MW_SW, AM_BAND_LW_MW_AIR, AM_BAND_LW_SW_AIR, AM_BAND_MW_SW_AIR,
-  AM_BAND_LW_MW, AM_BAND_LW_SW, AM_BAND_LW_AIR, 
-  AM_BAND_MW_SW, AM_BAND_MW_AIR,
-  AM_BAND_SW_AIR,
-  AM_BAND_LW, AM_BAND_MW, AM_BAND_SW, AM_BAND_AIR, AM_BAND_NONE,
-  AM_BAND_CNT
-};
-#endif /* end of HAS_AIR_BAND */
 
 // Toggle: OIRT -> FM
 enum RADIO_FM_BAND_SELECTION {
diff --git a/src/gui.cpp b/src/gui.cpp
index d2ed284..52a82cb 100644
--- a/src/gui.cpp
+++ b/src/gui.cpp
@@ -1,7 +1,6 @@
 #include "gui.h"
 #include "language.h"
 #include "constants.h"
-#include "config.h"
 #include <WiFi.h>
 #include <Wire.h>
 #include <EEPROM.h>
@@ -1194,27 +1193,7 @@ void ShowOneLine(byte position, byte item, bool selected) {
 
           FullLineSprite.setTextDatum(TR_DATUM);
           FullLineSprite.setTextColor(PrimaryColor, PrimaryColorSmooth, false);
-#ifdef HAS_AIR_BAND
-          switch (bandAM) {
-            case AM_BAND_ALL: FullLineSprite.drawString(myLanguage[language][102] + String(",") + myLanguage[language][103] + String(",") + myLanguage[language][104] + String(",") + myLanguage[language][223], 298, 3); break;
-            case AM_BAND_LW_MW_SW: FullLineSprite.drawString(myLanguage[language][102] + String(",") + myLanguage[language][103] + String(",") + myLanguage[language][104], 298, 3); break;
-            case AM_BAND_LW_MW_AIR: FullLineSprite.drawString(myLanguage[language][102] + String(",") + myLanguage[language][103] + String(",") + myLanguage[language][223], 298, 3); break;
-            case AM_BAND_LW_SW_AIR: FullLineSprite.drawString(myLanguage[language][102] + String(",") + myLanguage[language][104] + String(",") + myLanguage[language][223], 298, 3); break;
-            case AM_BAND_MW_SW_AIR: FullLineSprite.drawString(myLanguage[language][103] + String(",") + myLanguage[language][104] + String(",") + myLanguage[language][223], 298, 3); break;
-            case AM_BAND_LW_MW: FullLineSprite.drawString(myLanguage[language][102] + String(",") + myLanguage[language][103], 298, 3); break;
-            case AM_BAND_LW_SW: FullLineSprite.drawString(myLanguage[language][102] + String(",") + myLanguage[language][104], 298, 3); break;
-            case AM_BAND_LW_AIR: FullLineSprite.drawString(myLanguage[language][102] + String(",") + myLanguage[language][223], 298, 3); break;
-            case AM_BAND_MW_SW: FullLineSprite.drawString(myLanguage[language][103] + String(",") + myLanguage[language][104], 298, 3); break;
-            case AM_BAND_MW_AIR: FullLineSprite.drawString(myLanguage[language][103] + String(",") + myLanguage[language][223], 298, 3); break;
-            case AM_BAND_SW_AIR: FullLineSprite.drawString(myLanguage[language][104] + String(",") + myLanguage[language][223], 298, 3); break;
-            case AM_BAND_LW: FullLineSprite.drawString(myLanguage[language][102], 298, 3); break;
-            case AM_BAND_MW: FullLineSprite.drawString(myLanguage[language][103], 298, 3); break;
-            case AM_BAND_SW: FullLineSprite.drawString(myLanguage[language][104], 298, 3); break;
-            case AM_BAND_AIR: FullLineSprite.drawString(myLanguage[language][223], 298, 3); break;
-            case AM_BAND_NONE: FullLineSprite.drawString(myLanguage[language][83], 298, 3); break;
-          }
-          break;
-#else
+
           switch (bandAM) {
             case AM_BAND_ALL: FullLineSprite.drawString(myLanguage[language][102] + String(",") + myLanguage[language][103] + String(",") + myLanguage[language][104], 298, 3); break;
             case AM_BAND_LW_MW: FullLineSprite.drawString(myLanguage[language][102] + String(",") + myLanguage[language][103], 298, 3); break;
@@ -1225,8 +1204,7 @@ void ShowOneLine(byte position, byte item, bool selected) {
             case AM_BAND_SW: FullLineSprite.drawString(myLanguage[language][104], 298, 3); break;
             case AM_BAND_NONE: FullLineSprite.drawString(myLanguage[language][83], 298, 3); break;
           }
-           break;
-#endif
+          break;
 
         case DISPLAYSETTINGS:
           FullLineSprite.setTextDatum(TL_DATUM);
@@ -1640,22 +1618,10 @@ void BuildDisplay() {
     case BAND_LW: tftPrint(-1, myLanguage[language][102], 70, 32, bandColor, PrimaryColorSmooth, 16); break;
     case BAND_MW: tftPrint(-1, myLanguage[language][103], 70, 32, bandColor, PrimaryColorSmooth, 16); break;
     case BAND_SW: tftPrint(-1, myLanguage[language][104], 70, 32, bandColor, PrimaryColorSmooth, 16); break;
-#ifdef HAS_AIR_BAND
-    case BAND_AIR: tftPrint(-1, myLanguage[language][223], 70, 32, bandColor, PrimaryColorSmooth, 16); break;
-#endif
     case BAND_FM: tftPrint(-1, myLanguage[language][105], 70, 32, bandColor, PrimaryColorSmooth, 16); break;
     case BAND_OIRT: tftPrint(-1, myLanguage[language][106], 70, 32, bandColor, PrimaryColorSmooth, 16); break;
   }
-  if (band < BAND_GAP) tftPrint(-1, "MHz", 258, 76, ActiveColor, ActiveColorSmooth, 28); 
-  else {
-#ifdef HAS_AIR_BAND
-    if (band == AM_BAND_AIR) 
-      tftPrint(-1, "MHz", 258, 76, ActiveColor, ActiveColorSmooth, 28);
-    else tftPrint(-1, "KHz", 258, 76, ActiveColor, ActiveColorSmooth, 28);
-#else
-      tftPrint(-1, "KHz", 258, 76, ActiveColor, ActiveColorSmooth, 28);
-#endif
-  }
+  if (band < BAND_GAP) tftPrint(-1, "MHz", 258, 76, ActiveColor, ActiveColorSmooth, 28); else tftPrint(-1, "kHz", 258, 76, ActiveColor, ActiveColorSmooth, 28);
 
   RDSstatusold = false;
   Stereostatusold = false;
@@ -1819,26 +1785,7 @@ void MenuUp() {
           case ITEM8:
             bandAM++;
             if (bandAM > AM_BAND_CNT - 1) bandAM = AM_BAND_ALL;
-#ifdef HAS_AIR_BAND
-            switch (bandAM) {
-              case AM_BAND_ALL: OneBigLineSprite.drawString(myLanguage[language][102] + String(",") + myLanguage[language][103] + String(",") + myLanguage[language][104]+ String(",") + myLanguage[language][223], 135, 0); break;
-              case AM_BAND_LW_MW_SW: OneBigLineSprite.drawString(myLanguage[language][102] + String(",") + myLanguage[language][103] + String(",") + myLanguage[language][104], 135, 0); break;
-              case AM_BAND_LW_MW_AIR: OneBigLineSprite.drawString(myLanguage[language][102] + String(",") + myLanguage[language][103] + String(",") + myLanguage[language][223], 135, 0); break;
-              case AM_BAND_LW_SW_AIR: OneBigLineSprite.drawString(myLanguage[language][102] + String(",") + myLanguage[language][104] + String(",") + myLanguage[language][223], 135, 0); break;
-              case AM_BAND_MW_SW_AIR: OneBigLineSprite.drawString(myLanguage[language][103] + String(",") + myLanguage[language][104] + String(",") + myLanguage[language][223], 135, 0); break;
-              case AM_BAND_LW_MW: OneBigLineSprite.drawString(myLanguage[language][102] + String(",") + myLanguage[language][103], 135, 0); break;
-              case AM_BAND_LW_SW: OneBigLineSprite.drawString(myLanguage[language][102] + String(",") + myLanguage[language][104], 135, 0); break;
-              case AM_BAND_LW_AIR: OneBigLineSprite.drawString(myLanguage[language][102] + String(",") + myLanguage[language][223], 135, 0); break;
-              case AM_BAND_MW_SW: OneBigLineSprite.drawString(myLanguage[language][103] + String(",") + myLanguage[language][104], 135, 0); break;
-              case AM_BAND_MW_AIR: OneBigLineSprite.drawString(myLanguage[language][103] + String(",") + myLanguage[language][223], 135, 0); break;
-              case AM_BAND_SW_AIR: OneBigLineSprite.drawString(myLanguage[language][104] + String(",") + myLanguage[language][223], 135, 0); break;
-              case AM_BAND_LW: OneBigLineSprite.drawString(myLanguage[language][102], 135, 0); break;
-              case AM_BAND_MW: OneBigLineSprite.drawString(myLanguage[language][103], 135, 0); break;
-              case AM_BAND_SW: OneBigLineSprite.drawString(myLanguage[language][104], 135, 0); break;
-              case AM_BAND_AIR: OneBigLineSprite.drawString(myLanguage[language][223], 135, 0); break;
-              case AM_BAND_NONE: OneBigLineSprite.drawString(myLanguage[language][83], 135, 0); break;
-            }
-#else
+
             switch (bandAM) {
               case AM_BAND_ALL: OneBigLineSprite.drawString(myLanguage[language][102] + String(",") + myLanguage[language][103] + String(",") + myLanguage[language][104], 135, 0); break;
               case AM_BAND_LW_MW: OneBigLineSprite.drawString(myLanguage[language][102] + String(",") + myLanguage[language][103], 135, 0); break;
@@ -1849,7 +1796,7 @@ void MenuUp() {
               case AM_BAND_SW: OneBigLineSprite.drawString(myLanguage[language][104], 135, 0); break;
               case AM_BAND_NONE: OneBigLineSprite.drawString(myLanguage[language][83], 135, 0); break;
             }
-#endif
+
             OneBigLineSprite.pushSprite(24, 118);
             break;
 
@@ -2642,26 +2589,6 @@ void MenuDown() {
             bandAM--;
             if (bandAM > AM_BAND_CNT) bandAM = AM_BAND_NONE;
 
-#ifdef HAS_AIR_BAND
-            switch (bandAM) {
-              case AM_BAND_ALL: OneBigLineSprite.drawString(myLanguage[language][102] + String(",") + myLanguage[language][103] + String(",") + myLanguage[language][104]+ String(",") + myLanguage[language][223], 135, 0); break;
-              case AM_BAND_LW_MW_SW: OneBigLineSprite.drawString(myLanguage[language][102] + String(",") + myLanguage[language][103] + String(",") + myLanguage[language][104], 135, 0); break;
-              case AM_BAND_LW_MW_AIR: OneBigLineSprite.drawString(myLanguage[language][102] + String(",") + myLanguage[language][103] + String(",") + myLanguage[language][223], 135, 0); break;
-              case AM_BAND_LW_SW_AIR: OneBigLineSprite.drawString(myLanguage[language][102] + String(",") + myLanguage[language][104] + String(",") + myLanguage[language][223], 135, 0); break;
-              case AM_BAND_MW_SW_AIR: OneBigLineSprite.drawString(myLanguage[language][103] + String(",") + myLanguage[language][104] + String(",") + myLanguage[language][223], 135, 0); break;
-              case AM_BAND_LW_MW: OneBigLineSprite.drawString(myLanguage[language][102] + String(",") + myLanguage[language][103], 135, 0); break;
-              case AM_BAND_LW_SW: OneBigLineSprite.drawString(myLanguage[language][102] + String(",") + myLanguage[language][104], 135, 0); break;
-              case AM_BAND_LW_AIR: OneBigLineSprite.drawString(myLanguage[language][102] + String(",") + myLanguage[language][223], 135, 0); break;
-              case AM_BAND_MW_SW: OneBigLineSprite.drawString(myLanguage[language][103] + String(",") + myLanguage[language][104], 135, 0); break;
-              case AM_BAND_MW_AIR: OneBigLineSprite.drawString(myLanguage[language][103] + String(",") + myLanguage[language][223], 135, 0); break;
-              case AM_BAND_SW_AIR: OneBigLineSprite.drawString(myLanguage[language][104] + String(",") + myLanguage[language][223], 135, 0); break;
-              case AM_BAND_LW: OneBigLineSprite.drawString(myLanguage[language][102], 135, 0); break;
-              case AM_BAND_MW: OneBigLineSprite.drawString(myLanguage[language][103], 135, 0); break;
-              case AM_BAND_SW: OneBigLineSprite.drawString(myLanguage[language][104], 135, 0); break;
-              case AM_BAND_AIR: OneBigLineSprite.drawString(myLanguage[language][223], 135, 0); break;
-              case AM_BAND_NONE: OneBigLineSprite.drawString(myLanguage[language][83], 135, 0); break;
-            }
-#else
             switch (bandAM) {
               case AM_BAND_ALL: OneBigLineSprite.drawString(myLanguage[language][102] + String(",") + myLanguage[language][103] + String(",") + myLanguage[language][104], 135, 0); break;
               case AM_BAND_LW_MW: OneBigLineSprite.drawString(myLanguage[language][102] + String(",") + myLanguage[language][103], 135, 0); break;
@@ -2672,8 +2599,6 @@ void MenuDown() {
               case AM_BAND_SW: OneBigLineSprite.drawString(myLanguage[language][104], 135, 0); break;
               case AM_BAND_NONE: OneBigLineSprite.drawString(myLanguage[language][83], 135, 0); break;
             }
-#endif
-
             OneBigLineSprite.pushSprite(24, 118);
             break;
 
@@ -3176,7 +3101,6 @@ void MenuDown() {
 
             OneBigLineSprite.drawString((showSWMIBand ? myLanguage[language][42] : myLanguage[language][30]), 135, 0);
             OneBigLineSprite.pushSprite(24, 118);
- 
             break;
 
           case ITEM5:
@@ -3531,26 +3455,6 @@ void DoMenu() {
           case ITEM8:
             Infoboxprint(myLanguage[language][101]);
 
-#ifdef HAS_AIR_BAND
-            switch (bandAM) {
-              case AM_BAND_ALL: OneBigLineSprite.drawString(myLanguage[language][102] + String(",") + myLanguage[language][103] + String(",") + myLanguage[language][104]+ String(",") + myLanguage[language][223], 135, 0); break;
-              case AM_BAND_LW_MW_SW: OneBigLineSprite.drawString(myLanguage[language][102] + String(",") + myLanguage[language][103] + String(",") + myLanguage[language][104], 135, 0); break;
-              case AM_BAND_LW_MW_AIR: OneBigLineSprite.drawString(myLanguage[language][102] + String(",") + myLanguage[language][103] + String(",") + myLanguage[language][223], 135, 0); break;
-              case AM_BAND_LW_SW_AIR: OneBigLineSprite.drawString(myLanguage[language][102] + String(",") + myLanguage[language][104] + String(",") + myLanguage[language][223], 135, 0); break;
-              case AM_BAND_MW_SW_AIR: OneBigLineSprite.drawString(myLanguage[language][103] + String(",") + myLanguage[language][104] + String(",") + myLanguage[language][223], 135, 0); break;
-              case AM_BAND_LW_MW: OneBigLineSprite.drawString(myLanguage[language][102] + String(",") + myLanguage[language][103], 135, 0); break;
-              case AM_BAND_LW_SW: OneBigLineSprite.drawString(myLanguage[language][102] + String(",") + myLanguage[language][104], 135, 0); break;
-              case AM_BAND_LW_AIR: OneBigLineSprite.drawString(myLanguage[language][102] + String(",") + myLanguage[language][223], 135, 0); break;
-              case AM_BAND_MW_SW: OneBigLineSprite.drawString(myLanguage[language][103] + String(",") + myLanguage[language][104], 135, 0); break;
-              case AM_BAND_MW_AIR: OneBigLineSprite.drawString(myLanguage[language][103] + String(",") + myLanguage[language][223], 135, 0); break;
-              case AM_BAND_SW_AIR: OneBigLineSprite.drawString(myLanguage[language][104] + String(",") + myLanguage[language][223], 135, 0); break;
-              case AM_BAND_LW: OneBigLineSprite.drawString(myLanguage[language][102], 135, 0); break;
-              case AM_BAND_MW: OneBigLineSprite.drawString(myLanguage[language][103], 135, 0); break;
-              case AM_BAND_SW: OneBigLineSprite.drawString(myLanguage[language][104], 135, 0); break;
-              case AM_BAND_AIR: OneBigLineSprite.drawString(myLanguage[language][223], 135, 0); break;
-              case AM_BAND_NONE: OneBigLineSprite.drawString(myLanguage[language][83], 135, 0); break;
-            }
-#else
             switch (bandAM) {
               case AM_BAND_ALL: OneBigLineSprite.drawString(myLanguage[language][102] + String(",") + myLanguage[language][103] + String(",") + myLanguage[language][104], 135, 0); break;
               case AM_BAND_LW_MW: OneBigLineSprite.drawString(myLanguage[language][102] + String(",") + myLanguage[language][103], 135, 0); break;
@@ -3561,8 +3465,6 @@ void DoMenu() {
               case AM_BAND_SW: OneBigLineSprite.drawString(myLanguage[language][104], 135, 0); break;
               case AM_BAND_NONE: OneBigLineSprite.drawString(myLanguage[language][83], 135, 0); break;
             }
-#endif
-
             OneBigLineSprite.pushSprite(24, 118);
             break;
 
diff --git a/src/language.h b/src/language.h
index 7ad66fc..125dc9d 100644
--- a/src/language.h
+++ b/src/language.h
@@ -5,7 +5,7 @@
 
 // [number of languages][number of texts]
 // *** means the text is the same as in English
-static const char* const myLanguage[18][224] PROGMEM = {
+static const char* const myLanguage[18][223] PROGMEM = {
   { "English", // English
     "Rotary direction changed", // 1
     "Please release button", // 2
@@ -228,8 +228,7 @@ static const char* const myLanguage[18][224] PROGMEM = {
     "Auto cancel scan", // 219
     "Correct PI", // 220
     "Signal", // 221
-    "Mute audio\nwhile scanning", // 222
-    "AIR" // 223
+    "Mute audio\nwhile scanning" // 222
   },
 
   { "Nederlands", // Dutch
@@ -454,8 +453,7 @@ static const char* const myLanguage[18][224] PROGMEM = {
     "Auto afbreken", // 219
     "Correcte PI", // 220
     "Signaal", // 221
-    "Geen geluid\ntijdens scannen", // 222
-    "AIR" // 223
+    "Geen geluid\ntijdens scannen" // 222
   },
 
   { "Polski", // Polish
@@ -680,8 +678,7 @@ static const char* const myLanguage[18][224] PROGMEM = {
     "Automatyczne\nanulowanie skanowania", // 219
     "Poprawne PI", // 220
     "Sygnał", // 221
-    "Wycisz dźwięk\npodczas skanowania", // 222
-    "AIR" // 223
+    "Wycisz dźwięk\npodczas skanowania" // 222
   },
 
   { "Hrvatski", // Croatian
@@ -906,8 +903,7 @@ static const char* const myLanguage[18][224] PROGMEM = {
     "Auto cancel scan", // 219
     "Correct PI", // 220
     "Signal", // 221
-    "Mute audio\nwhile scanning", // 222
-    "AIR" // 223
+    "Mute audio\nwhile scanning" // 222
   },
 
   { "Ελληνικά", // Greek
@@ -1132,8 +1128,7 @@ static const char* const myLanguage[18][224] PROGMEM = {
     "Αυτόματη ακύρωση\nανίχνευσης", // 219
     "Σωστό PI", // 220
     "Σήμα", // 221
-    "Σίγαση ήχου\nκατά την ανίχνευση", // 222
-    "AIR" // 223
+    "Σίγαση ήχου\nκατά την ανίχνευση" // 222
   },
 
   { "Română", // Romanian
@@ -1358,8 +1353,7 @@ static const char* const myLanguage[18][224] PROGMEM = {
     "Auto cancel scan", // 219
     "Correct PI", // 220
     "Signal", // 221
-    "Mute audio\nwhile scanning", // 222
-    "AIR" // 223
+    "Mute audio\nwhile scanning" // 222
   },
 
   { "Deutsch", // German
@@ -1584,8 +1578,7 @@ static const char* const myLanguage[18][224] PROGMEM = {
     "Automatisches Scan-Ende", // 219
     "Korrekter PI-Code", // 220
     "Signal", // 221
-    "Stumm beim Scannen", // 222
-    "AIR" // 223
+    "Stumm beim Scannen" // 222
   },
 
   { "Český", // Czech
@@ -1810,8 +1803,7 @@ static const char* const myLanguage[18][224] PROGMEM = {
     "Auto cancel scan", // 219
     "Correct PI", // 220
     "Signal", // 221
-    "Mute audio\nwhile scanning", // 222
-    "AIR" // 223
+    "Mute audio\nwhile scanning" // 222
   },
 
   { "Slovenský", // Slovak
@@ -2036,8 +2028,7 @@ static const char* const myLanguage[18][224] PROGMEM = {
     "Auto cancel scan", // 219
     "Correct PI", // 220
     "Signal", // 221
-    "Mute audio\nwhile scanning", // 222
-    "AIR" // 223
+    "Mute audio\nwhile scanning" // 222
   },
 
   { "Français", // French
@@ -2262,8 +2253,7 @@ static const char* const myLanguage[18][224] PROGMEM = {
     "Annuler automatiquement", // 219
     "PI Correct", // 220
     "Signal", // 221
-    "Audio muet lors\nde la numérisation", // 222
-    "AIR" // 223
+    "Audio muet lors\nde la numérisation" // 222
   },
 
   { "Български", // Bulgarian
@@ -2488,8 +2478,7 @@ static const char* const myLanguage[18][224] PROGMEM = {
     "Auto cancel scan", // 219
     "Correct PI", // 220
     "Signal", // 221
-    "Mute audio\nwhile scanning", // 222
-    "AIR" // 223
+    "Mute audio\nwhile scanning" // 222
   },
 
   { "Русский", // Russian
@@ -2714,8 +2703,7 @@ static const char* const myLanguage[18][224] PROGMEM = {
     "Автоматическая отмена \nсканирования", // 219
     "При корректном PI", // 220
     "При наличии сигнала", // 221
-    "Отключать аудио\nпри сканировании", // 222
-    "AIR" // 223
+    "Отключать аудио\nпри сканировании" // 222
   },
 
   { "Українська", // Ukranian
@@ -2940,8 +2928,7 @@ static const char* const myLanguage[18][224] PROGMEM = {
     "Auto cancel scan", // 219
     "Correct PI", // 220
     "Signal", // 221
-    "Mute audio\nwhile scanning", // 222
-    "AIR" // 223
+    "Mute audio\nwhile scanning" // 222
   },
 
   { "Italiano", // Italian
@@ -3166,8 +3153,7 @@ static const char* const myLanguage[18][224] PROGMEM = {
     "Fine scansione automatica", // 219
     "PI corretto", // 220
     "Signale", // 221
-    "Audio silenziato\ndurante scansione", // 222
-    "AIR" // 223
+    "Audio silenziato\ndurante scansione" // 222
   },
 
   { "Simplified Chinese", // Simplified Chinese
@@ -3392,8 +3378,7 @@ static const char* const myLanguage[18][224] PROGMEM = {
     "扫频停台条件", // 219
     "节目识别码正确", // 220
     "信号超阈值", // 221
-    "扫描时静音", // 222
-    "AIR" // 223
+    "扫描时静音" // 222
   },
 
   { "Norsk", // Norwegian
@@ -3618,8 +3603,7 @@ static const char* const myLanguage[18][224] PROGMEM = {
     "Avbryt skanning automatisk", // 219
     "korrekt PI", // 220
     "Signal", // 221
-    "Demp lyden\nmens du skanner", // 222
-    "AIR" // 223
+    "Demp lyden\nmens du skanner" // 222
   },
 
   { "Español", // Spanish
@@ -3844,8 +3828,7 @@ static const char* const myLanguage[18][224] PROGMEM = {
     "Cancelar automáticamente\nla búsqueda", // 219
     "PI correcto", // 220
     "Señal", // 221
-    "Audio mudo\nmientras busca", // 222
-    "AIR" // 223
+    "Audio mudo\nmientras busca" // 222
   },
 
   { "Português", // Portuguese
@@ -4070,8 +4053,7 @@ static const char* const myLanguage[18][224] PROGMEM = {
     "Cancelar automatic.\na pesquisa", // 219
     "PI correto", // 220
     "Sinal", // 221
-    "Mudo áudio\nenquanto procura", // 222
-    "AIR" // 223
+    "Mudo áudio\nenquanto procura" // 222
   }
 };
 #endif