Since last week the microphone of my headsets is stops working in the middle of the call. At the beginning it works fine, but after a while (maybe when the screen gets black, not sure), the other person can’t here me any more. After unplugging the headset (and sometimes switching speaker on and off again) the other person hears me again.
First I thought my headset was damaged, and bought a new one, but I have the same problems with the new one.
As I have the phone lying on the table meanwhile, this can’t be an issue of the proximity sensor.