So I'm a current AT&T customer and am considering jumping ship over to Sprint. I'm also one of those people who enjoys upgrading their iPhone once a year. I know AT&Ts current upgrade policies ($199 when you qualify; $450 early), but how does Sprint do this? If I want to say, upgrade to the 5 in a year (or whenever it comes out), will I be required to pay the full price of the phone at $650, or will it be similar to AT&T and be $450? This is more or less my deciding factor since they would be about the same bill-wise month to month.