There are 2 microphones on the iPhone 4. There is one on the top of the device that is utilized when you are using your speaker phone or when recording a video on your phone.The other microphone is when you are talking normally through the ear piece and the speaker phone function is not enabled. Estimated Repair Time: 15 min
Original Retail Cost: $55 + tax (-$10 in store instant coupon) Repair Cost: $45 + tax
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