You know, I would use T-Mobile if not for two reasons.

1. Coverage. I travel a decent amount and while T-Mobile is catching up, it's still quite a bit worse than AT&T.

2. Building penetration was noticeably worse with T-Mobile when I had it and unless they've started going for denser cell sites, it's not going to get better. The fact that both their GSM and 3G bands are mostly up there in the spectrum will continue to be a hurdle (1700,1900, & 2100 MHz although I'm not sure if they have any 850Mhz).

They had pretty good customer service (far better than AT&T *cough*Cingular*cough*) and the plans were and continue to be great value. But what good is all of that when I can't use it half the time, right?

I really hate the state of the cellular industry in the US.