Hi, all. I've never considered a BB until I just won a Pearl in a contest this week.

It is an AT&T model, but my current wireless carrier is T-Mobile.
Good news: AT&T has told me that they will unlock the device, since it was purchased at full retail without a service plan. I hope to have the unlock code in a day or two.
I assume (someone correct me) that once it is unlocked, I could use it on my current T-Mobile account if I add a BB data plan, or just open a new AT&T account. Am I correct so far?
What are the differences, if any, between T-Mo and AT&T with respect to the BB?
Thanks.
- Earl