How do I do a restore on my iPhone5S?
I changed my email address (Apple ID) but the little window keeps popping up asking for the password for my OLD email address. I signed out of my old ID before changing it so I don't understand it. I took my iPhone5S to BestBuy and they tried to solve the problem but couldn't. They said I should go home, do a backup to my computer then restore the phone. Help, please!
iPhone 4S, iOS 5.0.1