I foolishly gave another online gamer my phones UDID not knowing he could use it to hijack my phones game accounts. Withbit he was able to change ID's, reset my games repeatedly, and even used my game account to purchase more game credits on iTunes. I had to cancel my bank card so he couldn't run it up. My question is how can you change or remove the existing udid from your iPhone? My phone is not jailbroke and I'm not going to. I know people buy used iPhones, how do they change the udid so the new owner can't access the original owners info? Can apple reset for me? Please help!