Since complaining two days ago about being overbilled by AT&T, my phone has been shut off entirely. No explanation. They do a great sending me spam email, spam SMS, and junk mail, but they can't tell me why they shut off my service.
I suspect they think I owe them money. I tried calling but, guess what? Due to heavy call volume your wait will be over 10 minutes. And their hold music is offsensive, a mixture of advertising, static, and volume changes that guarantees you can't concentrate on anything while it's on speakerphone.
I am amazed at AT&T's contempt for its customers.
Update 2004-01-31: turns out it was not a billing problem. Pulling the SIM card out and putting it back in fixed it.