I have a sprint iphone 4s, and the service has been cut off due to non-payment before the end of the 2 year contract. Is it possible to unlock this phone and use it one a prepaid/payasyougo network? I used to have a jailbroken/unlocked att iphone 3g that i used on tmobile prepaid. Is this same thing possible with my 4s? I hear that virgin mobile offers a 4s on their prepaid network. Can i just unlock mine and buy a cheap crappy virgin phone and switch the sim into the 4s? Any ideas on anything i can do with the 4s other than the obvious..pay the sprint bill?