I have used it half of the day, just got it. Talked over the speaker phone, played with it, took pics, videos, etc etc, get to work and got a call. Answered it but could not hear anyone. Hung up, they called back, but this time I pressed speakerphone. I could hear them, so during the call I turned speaker phone off and put the phone up to my ear and could not hear a thing! WTF? I can't even hear a ring tone when I call someone. NOTHING. I'm going to try to take it back to the AT&T store in the morning and if they act funny I'll call Apple for a replacement. Anyone have any ideas? I had not used a set of earphones yet or BT headset. I even did a restore and it still does the same thing.