diff --git a/src/modules/RFM9x/RFM95.cpp b/src/modules/RFM9x/RFM95.cpp
index b6a84e7e..ff614852 100644
--- a/src/modules/RFM9x/RFM95.cpp
+++ b/src/modules/RFM9x/RFM95.cpp
@@ -19,10 +19,6 @@ int16_t RFM95::begin(float freq, float bw, uint8_t sf, uint8_t cr, uint8_t syncW
   RADIOLIB_DEBUG_PRINTLN(F("M\tSX1278"));
   RADIOLIB_DEBUG_PRINTLN(F("M\tRFM95"));
 
-  // configure settings not accessible by API
-  state = config();
-  RADIOLIB_ASSERT(state);
-
   // configure publicly accessible settings
   state = setFrequency(freq);
   RADIOLIB_ASSERT(state);
diff --git a/src/modules/RFM9x/RFM96.cpp b/src/modules/RFM9x/RFM96.cpp
index d7854c9f..2d6978b9 100644
--- a/src/modules/RFM9x/RFM96.cpp
+++ b/src/modules/RFM9x/RFM96.cpp
@@ -18,11 +18,7 @@ int16_t RFM96::begin(float freq, float bw, uint8_t sf, uint8_t cr, uint8_t syncW
   }
   RADIOLIB_DEBUG_PRINTLN(F("M\tSX1278"));
   RADIOLIB_DEBUG_PRINTLN(F("M\tRFM96"));
-
-  // configure settings not accessible by API
-  state = config();
-  RADIOLIB_ASSERT(state);
-
+  
   // configure publicly accessible settings
   state = setFrequency(freq);
   RADIOLIB_ASSERT(state);
diff --git a/src/modules/SX127x/SX1272.cpp b/src/modules/SX127x/SX1272.cpp
index e4c0bb60..f6b23efc 100644
--- a/src/modules/SX127x/SX1272.cpp
+++ b/src/modules/SX127x/SX1272.cpp
@@ -10,10 +10,6 @@ int16_t SX1272::begin(float freq, float bw, uint8_t sf, uint8_t cr, uint8_t sync
   int16_t state = SX127x::begin(SX1272_CHIP_VERSION, syncWord, preambleLength);
   RADIOLIB_ASSERT(state);
 
-  // configure settings not accessible by API
-  state = config();
-  RADIOLIB_ASSERT(state);
-
   // mitigation of receiver spurious response
   // see SX1272/73 Errata, section 2.2 for details
   state = _mod->SPIsetRegValue(0x31, 0b10000000, 7, 7);
@@ -46,10 +42,6 @@ int16_t SX1272::beginFSK(float freq, float br, float rxBw, float freqDev, int8_t
   int16_t state = SX127x::beginFSK(SX1272_CHIP_VERSION, br, rxBw, freqDev, preambleLength, enableOOK);
   RADIOLIB_ASSERT(state);
 
-  // configure settings not accessible by API
-  state = configFSK();
-  RADIOLIB_ASSERT(state);
-
   // configure publicly accessible settings
   state = setFrequency(freq);
   RADIOLIB_ASSERT(state);
diff --git a/src/modules/SX127x/SX1273.cpp b/src/modules/SX127x/SX1273.cpp
index 97178f81..49e12e3c 100644
--- a/src/modules/SX127x/SX1273.cpp
+++ b/src/modules/SX127x/SX1273.cpp
@@ -10,10 +10,6 @@ int16_t SX1273::begin(float freq, float bw, uint8_t sf, uint8_t cr, uint8_t sync
   int16_t state = SX127x::begin(SX1272_CHIP_VERSION, syncWord, preambleLength);
   RADIOLIB_ASSERT(state);
 
-  // configure settings not accessible by API
-  state = config();
-  RADIOLIB_ASSERT(state);
-
   // mitigation of receiver spurious response
   // see SX1272/73 Errata, section 2.2 for details
   state = _mod->SPIsetRegValue(0x31, 0b10000000, 7, 7);
diff --git a/src/modules/SX127x/SX1276.cpp b/src/modules/SX127x/SX1276.cpp
index 848f0949..fa99cef2 100644
--- a/src/modules/SX127x/SX1276.cpp
+++ b/src/modules/SX127x/SX1276.cpp
@@ -10,10 +10,6 @@ int16_t SX1276::begin(float freq, float bw, uint8_t sf, uint8_t cr, uint8_t sync
   int16_t state = SX127x::begin(SX1278_CHIP_VERSION, syncWord, preambleLength);
   RADIOLIB_ASSERT(state);
 
-  // configure settings not accessible by API
-  state = config();
-  RADIOLIB_ASSERT(state);
-
   // configure publicly accessible settings
   state = setFrequency(freq);
   RADIOLIB_ASSERT(state);
@@ -41,10 +37,6 @@ int16_t SX1276::beginFSK(float freq, float br, float freqDev, float rxBw, int8_t
   int16_t state = SX127x::beginFSK(SX1278_CHIP_VERSION, br, freqDev, rxBw, preambleLength, enableOOK);
   RADIOLIB_ASSERT(state);
 
-  // configure settings not accessible by API
-  state = configFSK();
-  RADIOLIB_ASSERT(state);
-
   // configure publicly accessible settings
   state = setFrequency(freq);
   RADIOLIB_ASSERT(state);
diff --git a/src/modules/SX127x/SX1277.cpp b/src/modules/SX127x/SX1277.cpp
index 005f1ca0..284b7c87 100644
--- a/src/modules/SX127x/SX1277.cpp
+++ b/src/modules/SX127x/SX1277.cpp
@@ -10,10 +10,6 @@ int16_t SX1277::begin(float freq, float bw, uint8_t sf, uint8_t cr, uint8_t sync
   int16_t state = SX127x::begin(SX1278_CHIP_VERSION, syncWord, preambleLength);
   RADIOLIB_ASSERT(state);
 
-  // configure settings not accessible by API
-  state = config();
-  RADIOLIB_ASSERT(state);
-
   // configure publicly accessible settings
   state = setFrequency(freq);
   RADIOLIB_ASSERT(state);
@@ -41,10 +37,6 @@ int16_t SX1277::beginFSK(float freq, float br, float freqDev, float rxBw, int8_t
   int16_t state = SX127x::beginFSK(SX1278_CHIP_VERSION, br, freqDev, rxBw, preambleLength, enableOOK);
   RADIOLIB_ASSERT(state);
 
-  // configure settings not accessible by API
-  state = configFSK();
-  RADIOLIB_ASSERT(state);
-
   // configure publicly accessible settings
   state = setFrequency(freq);
   RADIOLIB_ASSERT(state);
diff --git a/src/modules/SX127x/SX1278.cpp b/src/modules/SX127x/SX1278.cpp
index 906c4e07..efa065c6 100644
--- a/src/modules/SX127x/SX1278.cpp
+++ b/src/modules/SX127x/SX1278.cpp
@@ -10,10 +10,6 @@ int16_t SX1278::begin(float freq, float bw, uint8_t sf, uint8_t cr, uint8_t sync
   int16_t state = SX127x::begin(SX1278_CHIP_VERSION, syncWord, preambleLength);
   RADIOLIB_ASSERT(state);
 
-  // configure settings not accessible by API
-  state = config();
-  RADIOLIB_ASSERT(state);
-
   // configure publicly accessible settings
   state = setFrequency(freq);
   RADIOLIB_ASSERT(state);
@@ -41,10 +37,6 @@ int16_t SX1278::beginFSK(float freq, float br, float freqDev, float rxBw, int8_t
   int16_t state = SX127x::beginFSK(SX1278_CHIP_VERSION, br, freqDev, rxBw, preambleLength, enableOOK);
   RADIOLIB_ASSERT(state);
 
-  // configure settings not accessible by API
-  state = configFSK();
-  RADIOLIB_ASSERT(state);
-
   // configure publicly accessible settings
   state = setFrequency(freq);
   RADIOLIB_ASSERT(state);
diff --git a/src/modules/SX127x/SX1279.cpp b/src/modules/SX127x/SX1279.cpp
index 346643d0..ad580404 100644
--- a/src/modules/SX127x/SX1279.cpp
+++ b/src/modules/SX127x/SX1279.cpp
@@ -10,10 +10,6 @@ int16_t SX1279::begin(float freq, float bw, uint8_t sf, uint8_t cr, uint8_t sync
   int16_t state = SX127x::begin(SX1278_CHIP_VERSION, syncWord, preambleLength);
   RADIOLIB_ASSERT(state);
 
-  // configure settings not accessible by API
-  state = config();
-  RADIOLIB_ASSERT(state);
-
   // configure publicly accessible settings
   state = setFrequency(freq);
   RADIOLIB_ASSERT(state);
@@ -41,10 +37,6 @@ int16_t SX1279::beginFSK(float freq, float br, float freqDev, float rxBw, int8_t
   int16_t state = SX127x::beginFSK(SX1278_CHIP_VERSION, br, freqDev, rxBw, preambleLength, enableOOK);
   RADIOLIB_ASSERT(state);
 
-  // configure settings not accessible by API
-  state = configFSK();
-  RADIOLIB_ASSERT(state);
-
   // configure publicly accessible settings
   state = setFrequency(freq);
   RADIOLIB_ASSERT(state);
diff --git a/src/modules/SX127x/SX127x.cpp b/src/modules/SX127x/SX127x.cpp
index a08b0374..e842cdd0 100644
--- a/src/modules/SX127x/SX127x.cpp
+++ b/src/modules/SX127x/SX127x.cpp
@@ -23,6 +23,10 @@ int16_t SX127x::begin(uint8_t chipVersion, uint8_t syncWord, uint16_t preambleLe
   int16_t state = standby();
   RADIOLIB_ASSERT(state);
 
+  // configure settings not accessible by API
+  state = config();
+  RADIOLIB_ASSERT(state);
+
   // check active modem
   if(getActiveModem() != SX127X_LORA) {
     // set LoRa mode
@@ -61,8 +65,15 @@ int16_t SX127x::beginFSK(uint8_t chipVersion, float br, float freqDev, float rxB
   }
   RADIOLIB_DEBUG_PRINTLN(F("M\tSX127x"));
 
+  // set mode to standby
+  int16_t state = standby();
+  RADIOLIB_ASSERT(state);
+
+  // configure settings not accessible by API
+  state = configFSK();
+  RADIOLIB_ASSERT(state);
+
   // check currently active modem
-  int16_t state;
   if(getActiveModem() != SX127X_FSK_OOK) {
     // set FSK mode
     state = setActiveModem(SX127X_FSK_OOK);
@@ -1059,7 +1070,7 @@ int16_t SX127x::configFSK() {
   _mod->SPIwriteRegister(SX127X_REG_IRQ_FLAGS_2, SX127X_FLAG_FIFO_OVERRUN);
 
   // set packet configuration
-  state = _mod->SPIsetRegValue(SX127X_REG_PACKET_CONFIG_1, SX127X_PACKET_VARIABLE | SX127X_DC_FREE_WHITENING | SX127X_CRC_ON | SX127X_CRC_AUTOCLEAR_ON | SX127X_ADDRESS_FILTERING_OFF | SX127X_CRC_WHITENING_TYPE_CCITT, 7, 0);
+  state = _mod->SPIsetRegValue(SX127X_REG_PACKET_CONFIG_1, SX127X_PACKET_VARIABLE | SX127X_DC_FREE_NONE | SX127X_CRC_ON | SX127X_CRC_AUTOCLEAR_ON | SX127X_ADDRESS_FILTERING_OFF | SX127X_CRC_WHITENING_TYPE_CCITT, 7, 0);
   state |= _mod->SPIsetRegValue(SX127X_REG_PACKET_CONFIG_2, SX127X_DATA_MODE_PACKET | SX127X_IO_HOME_OFF, 6, 5);
   RADIOLIB_ASSERT(state);
 
@@ -1078,10 +1089,8 @@ int16_t SX127x::configFSK() {
   state |= _mod->SPIsetRegValue(SX127X_REG_RX_TIMEOUT_3, SX127X_TIMEOUT_SIGNAL_SYNC_OFF);
   RADIOLIB_ASSERT(state);
 
-  // enable preamble detector and set preamble length
+  // enable preamble detector
   state = _mod->SPIsetRegValue(SX127X_REG_PREAMBLE_DETECT, SX127X_PREAMBLE_DETECTOR_ON | SX127X_PREAMBLE_DETECTOR_2_BYTE | SX127X_PREAMBLE_DETECTOR_TOL);
-  state |= _mod->SPIsetRegValue(SX127X_REG_PREAMBLE_MSB_FSK, SX127X_PREAMBLE_SIZE_MSB);
-  state |= _mod->SPIsetRegValue(SX127X_REG_PREAMBLE_LSB_FSK, SX127X_PREAMBLE_SIZE_LSB);
 
   return(state);
 }