Hey good people,

I am wanting to unlock my BB Pearl (ATT) for use with t-mobile. How does this actually work? I know the whole process with the sim card and Meppd and all that. Once unlocked do I just input a t-mobile sim card and will it actually be on t-mobiles network? Thanks for any and all possible answers!

1. It works via the process outlined in the link below.

2. Yes. Of course, you need to have a TMo account, Data Plan, etc.

In case you do want to review the process:
How do I unlock my BlackBerry? - BlackBerryFAQ