ios 16.1.2 phone call problem using xs max

Kingsiew wrote:

i have a iphone xs max dual physical sim from china. yesterday updated to ios 16.1.2. everything works normally except normal phone call.

i cannot hear anything in the earpiece, speakerphone and also connected bluetooth devices. the other party also cannot hear me also. both listen and mic not function during normal phone call no matter i use earpiece, speaker phone or bluetooth devices.

but if i use other social apps, all audio call and video call function works normally.

please help. now i have to reject those normal calls and call back using others apps

If you hear no sound or distorted sound from your iPhone, iPad, or iPod touch speaker - Apple Support

If the microphones on your iPhone aren't working - Apple Support

Kingsiew wrote:

Cannot also

click on both those 2 links I provided and follow all the steps.