I got my phone on the 1st of August. I wish AT&T's service was better around here. Actually, its okay outside, I just wish it was better in my house, but I think i'll put up with the having to keep my phone in certain spots. Its worth it.
I had trouble with dropped calls and no 3G service in areas that have a strong 3G presence. (I am in Los Angeles, Ca) I called ATT and the sent some information to my phone and I have had good reception ever since.
I suggest all of you who have a problem give them a call.
Ive been a happy AT&T customer for 4 years and I loved my iPhone 2g and I love my iPhone 3g even more. So there's no reason to switch. I've been getting 2 3g bars inside the house and 4 bars outside and consistent 5 bars for edge so so far so good.