How Do I Unlock A T-Mobile Phone onto AT&T? (Windows Phone 7 , HTC HD7)?

I would like to know how I can "unlock" the HTC HD7 (Windows Phone 7) that is exclusively available on T-Mobile. I prefer this phone over the others, so if you could, how can I do this? Does this mean I have to pay for a T-Mobile contract? How easy is it- or is it even possible with WP7?

Hello. You can unlock your HTC HD7 safer and easier using unlock code. You can get the accurate unlock code for a HTC HD7 from TheUnlockArena.com at affordable cost with an easy unlocking guide.