Оригинальный сообщение: leevancleef ,
The microphone for speaking into the phone during a call is located at the bottom of your device where your mouth would be during a phone call. It is attached to your charge port. When you put it in speaker phone it switches to the mic at the top by your ear speaker. If the microphone attached to the chargeport is not working i would try cleaning out the holes by the bottom of your phone with some canned air and make sure the bottom is not obstructed, if that doesnt work you may want to try a settings reset, and than worse case a charge port replacement.