[UE4]no voice input on Quest1/2 voip

I get no input from mic when i start voip.

i used the sample sdk to implement voip into my project.

i enabled "Add permission to support Voice chat" in project settings, have voice enabled in DefaultEngine.ini(both [voice] and [OnlineSubsystem]). 

On the developer page all boxes for All platform features are approved in Data Use Checkup.

This is the code I used to start voip after creating and joining session.

for (auto RegisteredPlayer : RegisteredPlayers) {
	if (GEngine)
		GEngine->AddOnScreenDebugMessage(-1, 15.0f, FColor::Yellow, TEXT("33333"));
		// don't register the local player, only the remote
		if (RegisteredPlayer.Get() != *UserId.Get()) {
			OculusVoiceInterface->RegisterRemoteTalker(RegisteredPlayer.Get());
			OculusVoiceInterface->StartNetworkedVoice(0);
			UE_LOG_ONLINE(Display, TEXT("Registered a Talker: %s"), *RegisteredPlayer.Get().ToString());
			}
		}

 My log prints "registered a talker" with correct id.