My friend has an iPhone 5. It is his own but to get work e mail on it he let his company add their own stuff to it. I don't know exactly what. He backed up his phone on his home computer has normal before giving notice as they would wipe it when he left. He went home and restored it and only some of the contacts showed up. Lots of his personal contacts are gone. Can he go back to an older back up to see if his contacts are there? After they wiped his phone it actually stopped working with Verizon and apple had to replace it. Would something the company added have prevented some info from being backed up?