How Can You Change Which Microphone Is Used During Calls? My LG G4 phone's main microphone is broken but it's secondary microphone is working. That is, during ordinary calls or voice recordings, the microphone doesn't pick up any sound (completely dead) but during speakerphone calls or video recordings that microphone works fine.

Is there any way to permanently redirect the primary microphone to the secondary one, so that for ALL calls, the secondary microphone is used to pick up sound?
I just found a way to do that. You can use Tasker to automatically start the loudspeaker(which starts using secondary mic.) and then also add a rule to Tasker to reduce the loudspeaker volume to minimum which will very closely simulate the situation.