I want to buy an iPhone but I'm not excited about going with AT&T for the phone service. A few years ago my sister in-law got a cingular phone and returned it 1 week later because she couldn't get signal in her own house. I'm sure the network is improving all the time. I'm going to be living in Sewickley, PA (a suburb of Pittsburgh). Can anyone vouch for the service in this area? If anyone has any information on how the AT&T network may be improving/not improving in general please let me know.