you can use pda with cingular but you'll be wiping your pre-paid cards in literally a few minutes. the pick your plan will offer unlimited media but with phones, pda uses a different one, so you can use pda on pre-paid but for wat? a few minutes online and buy another card? i think people using pda on pre-paid the dumbest thing. if your willing pay over $600 for a pda and pay extra to have it unlocked, and pay the data charges, why don't you just get a dam credit card and post-paid.