Cingular FamilyTalk 850, Family Messaging Unlimited, 2GB/mo data
Originally Posted by pitflyer
I wouldn't say TMobile is useless as there are places where TMobile has coverage but AT&T doesn't. Not many but I did experience a few (as I used to be on TMobile and wife is on AT&T). Similarly for data, on TMobile though at best you would get low speed coverage.
If you paid full retail AT&T might/should give you the unlock code w/o hassle. You usually DO need a non-AT&T SIM card to unlock as putting that card in will make the phone request the unlock code at that point; it normally won't with an AT&T (or AT&T MVNO like Straight Talk) SIM.
I said it was useless with the One X. T-Mobile itself is another story.