I got a Lumia 920 on TMobile USA

[bovcrx]

The Rogers 920 supports UMTS on AWS.

Firstly, it says so right on the box.

Secondly, I confirmed it myself. I put my T-Mo SIM card into a device that I know for sure does NOT support AWS UMTS (it happens to be an unlocked int'l Lumia 900). I get only Edge on that device. I then put the SIM into my Rogers 920. I get 3G.

Help me out here. I won an ATT lumia 900 and had ATT unlock it. I live in a refarmed T-Mo area. Are there any special steps I have to do to get 3G working? All I get is E all day even after Nokia carrier setup app.