UNLOCK 3G IPhone ver2.2 baseband 2.30.03 (rebel sim or software availble at web?)

Hi Guys,

I have a new iphone with software version 2.2 and baseband 2.30.03. I purchase one 3Gsim to unlock Iphone but its good only for 2G. Meaning I cannot get any 3G signal and even lost some functionality like GPS, data.

What would you recommend me to purchase to unlock my iphone 3G with the software I got? Is it the rebel sim the best? or some advertisement download software to unlock iphone? Pls. help. Im out of US so if shipment will allow then I can purchase it. HOpe it can support the upcoming OS3.0 also

thanks

moved to *sim section