I had a bad experience today with T-Mobile. When I called customer service the rep was trying to be helpful, but their system is designed poorly, IMO, and he couldn't fix the problem. I've had T-Mobile for a year now, the call quality isn't as good as AT&T, and I only save about $10/month. I'm reluctant to return to AT&T (overpriced and often poor customer service), though, so I'm checking out some other carriers. Maybe I can find one that's not as bad as the others.