Hello, I just came to study in US from Europe. I bough a factory unlocked iPhone in Europe so I won't take the plan at AT&T or anything, all I need is an US number. I have been searching through Google but they have complicated prepaid plans, I haven't realized there are also plans for prepaid SIM's. I just want a US number and fill it with like $5 card, you know, pay as I go. You know where I can get that?