Okay so my friend wants me to unlock his 3gs. The thing is he is on AT&T so that really negates the purpose doesn't it? I think the reason why he wants me to do this is because he wants to make it so that he doesn't have to use AT&T's iphone data plan which I think is like $30. What he wants to do is to use one of their cheaper data plans, I think one that costs like $10. Is this possible?