It sure sounds like a steal. On Aug. 31, George Hotz plans to trade in his iPhone for a metallic blue Nissan 350Z sports car and three brand-new iPhones. But the 17-year-old’s device is no ordinary Apple phone. Hotz hacked his iPhone and unlocked it so that it can be used on a variety of cell-phone networks, becoming the first person known to have done so. The person buying Hotz’s phone, Terry Daidone, believes he’s the one getting the deal because Hotz has agreed to work for him at his cell-phone refurbishing company, CertiCell.