New Microphone Doesn't Work [redmi 4 Prime]


Hello,

my Redmi 4 Prime microphone doesn't work during calls or whatsapp calls, so the other person can't hear me. It seems like its deactivated.
When im using the sound record app the microphone is working very fine so i think it should be a software problem.

I tried:
- reset
- full wipe
- miui 8.0.6.0 to 8.1.2.0
- every xiaomi.eu up to 6.12.5
- check -> persist.audio.fluence.voicerec=false
Hi. Guess it's reason of some hardware issues...
Did you ask for help at some service centers?