No sound during call
Hello all !
Someone gave me an iPhone 6 on iOS 11.3.1.
On this iPhone 6 everything works just perfect except the sound during calls.
When i call someone, he can't hear me and i can't hear him (even in speaker mode).
Also the head-speaker and the micro are good. I have tested them with the voice memos.
I have also noticed that when someone call me even after i hangout the phone keep vibrating .
I have no problems with jack plug (i have tested it with an app).
I have downloaded a new firmware on Internet and flashed it with iTunes. It still don't work.
Can you help me ?