An iPhone I bought on ebay has gone crazy. It keeps going into restart by itself or goes into DFU mode and asks to be connected to iTunes. I attempted to jailbreak/unlock it and that didnt work either. After a restore it works fine for a little bit and then restarts or asks to be connected to iTunes. I asked this last night and someone said it could be due to water damage and they said i should check the water damage sensors. I have now checked them and they are still white, so it''s not due to water damage. Why is the iphone doing this and how do I stop it? Thanks guys.