diff --git a/examples/platforms/efr32/openthread-core-efr32-config.h b/examples/platforms/efr32/openthread-core-efr32-config.h
index c9b31002f..f8884e8fa 100644
--- a/examples/platforms/efr32/openthread-core-efr32-config.h
+++ b/examples/platforms/efr32/openthread-core-efr32-config.h
@@ -35,14 +35,6 @@
 #ifndef OPENTHREAD_CORE_EFR32_CONFIG_H_
 #define OPENTHREAD_CORE_EFR32_CONFIG_H_
 
-/**
- * @def OPENTHREAD_CONFIG_ENABLE_SOFTWARE_ACK_TIMEOUT
- *
- * Define to 1 if you want to enable software ACK timeout logic.
- *
- */
-#define OPENTHREAD_CONFIG_ENABLE_SOFTWARE_ACK_TIMEOUT          1
-
 /**
  * @def OPENTHREAD_CONFIG_ENABLE_SOFTWARE_RETRANSMIT
  *
diff --git a/examples/platforms/efr32/radio.c b/examples/platforms/efr32/radio.c
index 2d20f6792..22e496f27 100644
--- a/examples/platforms/efr32/radio.c
+++ b/examples/platforms/efr32/radio.c
@@ -298,10 +298,7 @@ otError otPlatRadioReceive(otInstance *aInstance, uint8_t aChannel)
 
     if (!sIsReceiverEnabled)
     {
-        if (RAIL_RxStart(aChannel))
-        {
-            assert(false);
-        }
+        otEXPECT_ACTION(RAIL_RxStart(aChannel) == RAIL_STATUS_NO_ERROR, error = OT_ERROR_FAILED);
 
         sIsReceiverEnabled = true;
     }
@@ -315,8 +312,10 @@ otError otPlatRadioTransmit(otInstance *aInstance, otRadioFrame *aFrame)
 {
     otError error = OT_ERROR_NONE;
     RAIL_CsmaConfig_t csmaConfig = RAIL_CSMA_CONFIG_802_15_4_2003_2p4_GHz_OQPSK_CSMA;
-    RAIL_TxData_t tx_data;
+    RAIL_TxData_t txData;
+    RAIL_TxOptions_t txOption;
     uint8_t frame[IEEE802154_MAX_LENGTH + 1];
+    bool isAckRequested = (aFrame->mPsdu[0] & IEEE802154_ACK_REQUEST) ? true : false;
     (void)aInstance;
 
     CORE_DECLARE_IRQ_STATE;
@@ -332,20 +331,25 @@ otError otPlatRadioTransmit(otInstance *aInstance, otRadioFrame *aFrame)
     frame[0] = aFrame->mLength;
     memcpy(frame + 1, aFrame->mPsdu, aFrame->mLength);
 
-    tx_data.dataPtr = frame;
-    tx_data.dataLength = aFrame->mLength - 1;
+    txData.dataPtr = frame;
+    txData.dataLength = aFrame->mLength - 1;
     RAIL_TxPowerSet(aFrame->mPower);
     setChannel(aFrame->mChannel);
     RAIL_RfIdleExt(RAIL_IDLE, true);
 
-    if (RAIL_TxDataLoad(&tx_data))
-    {
-        assert(false);
-    }
+    otEXPECT_ACTION(RAIL_TxDataLoad(&txData) == RAIL_STATUS_NO_ERROR, error = OT_ERROR_FAILED);
 
-    if (RAIL_TxStart(aFrame->mChannel, RAIL_CcaCsma, &csmaConfig))
+    if (isAckRequested)
     {
-        assert(false);
+        otEXPECT_ACTION(RAIL_TxStart(aFrame->mChannel, RAIL_CcaCsma, &csmaConfig) == RAIL_STATUS_NO_ERROR,
+                        error = OT_ERROR_FAILED);
+    }
+    else
+    {
+        txOption.waitForAck = false;
+
+        otEXPECT_ACTION(RAIL_TxStartWithOptions(aFrame->mChannel, &txOption, RAIL_CcaCsma, &csmaConfig) == RAIL_STATUS_NO_ERROR,
+                        error = OT_ERROR_FAILED);
     }
 
 exit:
@@ -368,7 +372,7 @@ int8_t otPlatRadioGetRssi(otInstance *aInstance)
 otRadioCaps otPlatRadioGetCaps(otInstance *aInstance)
 {
     (void)aInstance;
-    return OT_RADIO_CAPS_NONE;
+    return OT_RADIO_CAPS_ACK_TIMEOUT;
 }
 
 bool otPlatRadioGetPromiscuous(otInstance *aInstance)
@@ -758,6 +762,11 @@ void efr32RadioProcess(otInstance *aInstance)
     CORE_EXIT_CRITICAL();
 }
 
+void RAILCb_RxAckTimeout(void)
+{
+    sTransmitError = OT_ERROR_NO_ACK;
+}
+
 void RAILCb_RfReady(void)
 {
 }
@@ -766,10 +775,6 @@ void RAILCb_CalNeeded(void)
 {
 }
 
-void RAILCb_RxAckTimeout(void)
-{
-}
-
 void RAILCb_RxRadioStatus(uint8_t aStatus)
 {
     (void)aStatus;
diff --git a/include/openthread/platform/radio.h b/include/openthread/platform/radio.h
index 0b9116eea..b81cd64bc 100644
--- a/include/openthread/platform/radio.h
+++ b/include/openthread/platform/radio.h
@@ -66,7 +66,7 @@ extern "C" {
 
 enum
 {
-    OT_RADIO_FRAME_MAX_SIZE     = 127,                             ///< aMaxPHYPacketSize (IEEE 802.15.4-2006)
+    OT_RADIO_FRAME_MAX_SIZE      = 127,                             ///< aMaxPHYPacketSize (IEEE 802.15.4-2006)
     OT_RADIO_CHANNEL_MIN         = 11,                              ///< 2.4 GHz IEEE 802.15.4-2006
     OT_RADIO_CHANNEL_MAX         = 26,                              ///< 2.4 GHz IEEE 802.15.4-2006
     OT_RADIO_SUPPORTED_CHANNELS  = 0xffff << OT_RADIO_CHANNEL_MIN,  ///< 2.4 GHz IEEE 802.15.4-2006
@@ -116,9 +116,9 @@ typedef struct otRadioFrame
 typedef enum otRadioState
 {
     OT_RADIO_STATE_DISABLED = 0,
-    OT_RADIO_STATE_SLEEP = 1,
-    OT_RADIO_STATE_RECEIVE = 2,
-    OT_RADIO_STATE_TRANSMIT = 3
+    OT_RADIO_STATE_SLEEP    = 1,
+    OT_RADIO_STATE_RECEIVE  = 2,
+    OT_RADIO_STATE_TRANSMIT = 3,
 } otRadioState;
 
 /**