I have two iPhones, one was using my GoPhones sim with no problems, till I updated to 1.1.3. Now the sim won't work in the iPhone at all. I have tried to downgrade to 1.1.1 and 1.1.2 but I just get errors before the downgrade even tries, something like there were errors that occurred (1). Anyone have any ideas how to downgrade this iPhone? It is a week 26 if that matters.