I have my doubts (there's a reason why AT&T was ranked dead last in customer service), but I suppose it's worth a try.Tek, I was on T-Mobile (poorest service EVER) for the longest time and when my contract ran out I could simply buy a new phone and stay off a contract, perhaps AT&T would let you do the same?
But given the choice between AT&T customer support and a stranger trying to sell an old cell phone on craigslist, I think I'd have to opt for the stranger.