No, there hasn't! I saw someone else asking this on the Sprint forums just recently and a rep said no, they couldn't do it.
It may change in the future, but at this time, won't work.
No You would have to unlock the Sprint phone first and Sprint does not under any circumstance allow domestic unlocks of it's phones. Only international.I have a Current Virgin Mobile Account.... I want to buy a SPRINT Iphone 5 on EBAY, and take my Current Simm (Virgin Mobile) and plug it into the Sprint Phone and use in on my Virgin Mobile Contract...
IS IT POSSIBLE?