[o2mpx]

Yes the 9100 works on Tmo.

Just received an ATT 9100 bought from eBay, spent 99cents for an unlock code through eBay, got it a couple of hours later and unlocked it, working fine with a Tmo sim card. No 3g of course, just edge or gsm.

Have 2 weeks left on contract with Tmo and switching over to ATT. Don't really want to but Tmo's network reception is bad in my house. My friend's 4G MyTouch has great reception in my house, but there's no 4G Blackberry plus I really don't like Tmo's unique 3g frequencies.