Different voice and data plan carriers?

[Guest pinky]

Aloha B)

Don't know if this has been asked yet and this is my first post so please bear with me. I just ordered my HTC Touch Pro w/ a data plan only on AT&T but currently have T-mobile as my voice & data carrier. I live in Hawaii where T-mobile has not yet rolled out their 3G network, but AT&T has.

My question is whether I would be able to use my T-mobile voice plan and AT&T's data plan on a single unlocked Touch Pro? Does AT&T require a SIM card for their data plan only accounts? If yes, then I'm assuming the answer is NO since T-mobile requires a SIM for their phones.

Any answer/advice is greatly appreciated.

Mahalo!

[Guest Hurgle Durgle]

Yes, the data plan is bound to the sim card you use, so you'd have to swap them out to switch between T-Mobile and AT&T.