Former AT&T/Cingular customer here :
For the past 2 years, Cingular(changed their name to AT&T cuz Cingular has been KNOWN to have garbage service) has been giving me nothing but trouble. When I first sign up, they "fuxked" me over by transfering another line that I have "no idea" what the fuck is it. I told them thats not my line, they Took it off THEN they charged me 175 bux termination fee. I was like what the fuck. and it took me almost 2 months before they "oh yes its a mistake, MY BAD" and credit me back. and from time to time they charged me some msg or whatever that I never use/seen, but I didnt bother cuz its just like 5 cents or some shit.
did I mention that AT&T's network, like Parrdacc said, has black holes, service busy, drop calls, weak singal everywhere? and mind you I live in NYC and there should be no way that they're having all these problems.
my service expired on 11/2, I called, yell over the phone that they have garbage service and I will never join them ever again. then I pull all my lines over to T-mobile.
Ahh, so far no drop calls, no "surprised!" phone bill. no dead spot. nice.
AT&T is living off iPhone now(another garbage), Just wait till the contract between Apple and AT&T expires, then we can say bye bye to AT&T.