Galaxy A12 Microphone Issues

[MX7]

Several days ago both of the microphones on my Galaxy A12 failed during phone calls and voice recordings using the messaging app.  At best I could hear, and others I was talking to could hear, very faint sounds surrounded by static.

However....

When I use the video feature on the Camera app, both microphones record my voice clearly, without any static.

I am completely baffled as to the nature of this problem.  Is it bad hardware?  Bad software?

I tried a full factory reset and every other bit of advice related to the microphones, but the problem remains consistent.

The mics do not work when I make a phone call; they do work when I record a video.

Thanks in advance!

[Lisa Svenson]

Same issue here, I make a phone call I can hear them, they cannot hear me. If I use speaker phone they can hear me. 

[Daryl_ED]

The board that has the microphone and charge port is faulty.  I had exactly the same problem and fixed it by replacing the board.  This is similar to what I ordered: Pour Samsung Galaxy A12 A125F Port de Charge Dock Connecteur Casque Jack & Micro | eBay.  Look at the process for replacing the board.  Hardest part was spludging the case open.  Bing Videos .  Also need a spludge kit like this 22 in 1 Mobile Phone Repair Tools Kit Set Spudger Pry Opening Tool Screwdriver | eBay

[Jfceklosky]

You have to replace the lower mic.

This is a known DEFECT from Samsung!

[oshidipe]

i have the same issue with mine. the phone can only make call but i cant be heard by my callers. i can only hear them. i now use a bluetooth device to make my calls both    watsapp and normal calls.

i cant even do voice recording or video recording. 

[Jfceklosky]

Sorry to hear that...again another failed board.

You will need to have the mic board replaces.  It is not hard to change.