Originally Posted by
orionve
Actually, my phone is unlocked so I can use it with the local provider.
If this is the case, can I use it in the US with a prepaid sim card?
yes you can. but if you go with tmobile, make sure you turn 3g off, because the 3g frequency tmobile uses in the states is not supported by the iphone. If you go with ATT there shouldnt be any issues.