I had an Iphone Xs two moths ago. Suddenly during a call the microphone stopped working. The person I was talking to could not hear me, but I heard him. After a full reset (Erase all contents and settings) everything works except for microphone icon. The microphone Icon always has a bar across it, and says "muted" all the time when I tap on it during a call. But the microphone works ok even if it says it is muted. Any idea about this problem?