I am facing this problem since a long period of time. Randomly my microphone stops working and I can't talk to any call. I can hear sound off the other party but they can't hear mine. But when I connect my Bluetooth it works. I have tried by dialling *#0283# but I can't hear to my own voice, so it's confirmed that the mix does not work in that time. The problem fixes on restart.
I have even gone through a factory reset but the problem is recurring.
Thanks a lot Sir! It really helped. Even after factory reset, restoring backup recreates the problem. After doing Settings reset the problem has not reccured till now, which is an appreciable amount of time.
