A micro phone is also called mouth piece, used to convey our voice to other iPhones. If your voice in not clearly reaching your respondent then it is time to have a check for your iphone 4S microphone. Searching for a technician…. Don’t worry pick up your phone and call us at 04 4211494. Our pick and drop service will be initiated by your call. We will return you repaired iPhone 4S on the same day.