Bought an iPhone unlocked from Ebay on 9th April 2008. The spec is in my signature. All of a sudden I am getting the "Repair needed" message and the "No Service" in the top left of the screen. The phone is crashing and it sticks on things. I know I can't take it to an Apple store because it is unlocked, what are my options? If I restore it and take it to my local store will they not wonder why it is on the setup screen?