My original 4s had issues with phone calls. Half the time calls were made the person on the other end couldn't hear me. Took to Apple store and they gave me a new phone. I've had it 5 days and it has more issues then my 1st one. 50% of the time I make calls neither person can hear each other. I can't even hear it dialing the #, but I watch the call timer run as it does connect. Tried restoring the phone, but still no luck. Is it a hardware issue or AT&T issue? Anyone know?
closed as not a real question by bmike♦ Mar 20 '13 at 12:22
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It sounds like an issue with the hardware of the phone. I'd take it back to the Apple Store and have them swap it again. Before you leave, make a few calls on the new phone and make sure the issue is resolved. I've seen this issue pretty frequently on iPhone 4/S's