diff --git a/sdk/objc/native/src/audio/audio_device_ios.mm b/sdk/objc/native/src/audio/audio_device_ios.mm
index 3c3117d716..b59791e6e8 100644
--- a/sdk/objc/native/src/audio/audio_device_ios.mm
+++ b/sdk/objc/native/src/audio/audio_device_ios.mm
@@ -1045,13 +1045,17 @@ bool AudioDeviceIOS::MicrophoneIsInitialized() const {
 }
 
 int32_t AudioDeviceIOS::MicrophoneMuteIsAvailable(bool& available) {
-  available = false;
+  available = true;
   return 0;
 }
 
 int32_t AudioDeviceIOS::SetMicrophoneMute(bool enable) {
-  RTC_DCHECK_NOTREACHED() << "Not implemented";
-  return -1;
+  OSStatus result = audio_unit_->SetMicrophoneMute(enable);
+  if (result != noErr) {
+    RTCLogError(@"Set microphone %s failed, reason %d", enable ? "mute" : "unmute", result);
+    return -1;
+  }
+  return 0;
 }
 
 int32_t AudioDeviceIOS::MicrophoneMute(bool& enabled) const {
diff --git a/sdk/objc/native/src/audio/voice_processing_audio_unit.h b/sdk/objc/native/src/audio/voice_processing_audio_unit.h
index b40dba01e4..99586a94ed 100644
--- a/sdk/objc/native/src/audio/voice_processing_audio_unit.h
+++ b/sdk/objc/native/src/audio/voice_processing_audio_unit.h
@@ -92,6 +92,9 @@ class VoiceProcessingAudioUnit {
   // Uninitializes the underlying audio unit.
   bool Uninitialize();
 
+  // Mutes the microphone.
+  bool SetMicrophoneMute(bool enable);
+
   // Calls render on the underlying audio unit.
   OSStatus Render(AudioUnitRenderActionFlags* flags,
                   const AudioTimeStamp* time_stamp,
diff --git a/sdk/objc/native/src/audio/voice_processing_audio_unit.mm b/sdk/objc/native/src/audio/voice_processing_audio_unit.mm
index b538a35c23..fe35ce3609 100644
--- a/sdk/objc/native/src/audio/voice_processing_audio_unit.mm
+++ b/sdk/objc/native/src/audio/voice_processing_audio_unit.mm
@@ -398,6 +398,39 @@ bool VoiceProcessingAudioUnit::Uninitialize() {
   return true;
 }
 
+bool VoiceProcessingAudioUnit::SetMicrophoneMute(bool enable) {
+  RTC_DCHECK_GE(state_, kUninitialized);
+
+  RTCLog(@"Setting microphone %s.", enable ? "mute" : "unmute");
+
+  OSStatus result = noErr;
+  if (detect_mute_speech_) {
+    UInt32 muteUplinkOutput = enable ? 1 : 0;
+    result = AudioUnitSetProperty(vpio_unit_,
+                                  kAUVoiceIOProperty_MuteOutput,
+                                  kAudioUnitScope_Global,
+                                  kInputBus,
+                                  &muteUplinkOutput,
+                                  sizeof(muteUplinkOutput));
+  } else {
+    UInt32 enableInput = enable ? 0 : 1;
+    result = AudioUnitSetProperty(vpio_unit_,
+                                  kAudioOutputUnitProperty_EnableIO,
+                                  kAudioUnitScope_Input,
+                                  kInputBus,
+                                  &enableInput,
+                                  sizeof(enableInput));
+  }
+
+  if (result != noErr) {
+    RTCLogError(@"Failed to %s microphone. Error=%ld", (enable ? "mute" : "unmute"), (long)result);
+    return false;
+  }
+
+  RTCLog(@"Set microphone %s.", enable ? "mute" : "unmute");
+  return true;
+}
+
 OSStatus VoiceProcessingAudioUnit::Render(AudioUnitRenderActionFlags* flags,
                                           const AudioTimeStamp* time_stamp,
                                           UInt32 output_bus_number,