"Microphone not working when making/receiving calls"に関する回答Somebody says: Okay I did some research and I figure it all out no it's not a hardware or issue or a software issue it's actually kind of simple There's a new mic and that would be at the tip next to the headphone jack the little hole if there's something covering that hole no sound goes through I have slick wraps so it was being covered I took it off and did a video record test and the audio went through try it for your self when recording a video just tape that hole or put ur figure just to test it out and you will see. Hope this was some useful information. Update: BUT I SAY: THE PROBLEM IS THE BASIC (DOWN NEAR TO THE CHARGING JACK) MICROPHONE, OPEN THE BACK COVER OF THE IPHONE AND TAKE OUT THE MICROPHONE CAREFULLY, AND CLEAN THE MICROPHONE COVER FROM THE OUTSIDE AND INSIDE AND CAREFULLY CLEAN UP THE SMALL HOLE OF THE MICROPHONE ITSELF. THIS IS THE ONLY SOLUTION. USE A WOODEN TOOTH CLEANER STICK.