You would have to S-Off to be able to do that. Is this for the Sprint version? If so, the international unlock works well, but if you want to use it in the US, you will most likely have a lot of connection issues trying to stay connected to the towers when you move. It likes to drop off and you have to reset it a couple of times to get service back. Very frustrating. If you don't have the Sprint version, disregard.
