Last night my droid X turned off by itself and after taking the battery out and putting it back, it turned on, but it had a December 31, 1969 date which I think was super weird, but easy to change. After that, I called my son to see if the phone was working fine, but he didn't answer cause it said private number instead of my name and number. I called my own landline to see if it was working and once again it just said private number. When I tried calling myself, it just says unknown. Now, whenever I call is says "private number" and whenever I receive a call, even if it is a contact, it just says unknown. I called tech support, but they were not able to help. What could it be?