My One X suddenly decided that sim cards don't work. Fortunately, I have the AT&T insurance. They sent me an HTC One. Now I need to send them back the broken One X. How can I make sure my passwords, etc. are gone before I return it?
Actually, the phone is just fine except for the minor detail that it doesn't see the SIM card any more. No calls, no texts, etc. I wish I could keep it, but part of the insurance deal is that I have to return it.