I have a customer in my at&t Mobility store who is running 5.1.1 on an iPhone 4. All of his contacts randomly disapeared after a text from a stranger. He has never done a back up to iTunes or iCloud. There are no contacts in his yahoo account. Ive tried a soft reset and a few things I have seen in the forum. Nothing worked. Is there anything else I can try to get the contacts back?