I had ATT for a few years, then our shop became a Sprint dealer for almost two years (our location didnt really warrant new cellular sales, so they pulled us after a while). Anyways, I had sprint (1500 minutes for 14.99/month, why not
). The coverage was about the same as ATT, save for a few places Sprint wouldnt pick up. Once I gave up the Sprint, I went back to ATT and they shortly after they did the change to Cingular.
Once Cingular took over, gained the extra towers etc, I have dropped VERY few calls, I really cant tell you about their service, because I've never had to call them for anything. So I guess I'm happy with their service. I like their rollover plan as it lasts for a year, then you start back at 0 in January. Mobile to mobile is free anytime for anyone on Cingular, which is nice. My pick for sure.
On a side note, I dont really care for my Motorola phone (I've had Nokias since day one and most of the chargers interchange unlike the Motorolas)