Enter dfu mode, and then flash the 6.1.3 firmware, ok. This is for those who upgraded to ios7GM and don't have an Apple computer and itunes doesn't work. Oh. This is the equivalent of restoring factory settings and having to reactivate. After doing so, your apple is equivalent to a new machine. So if you didn't have a backup before you swiped ios7GM, you won't have any of your previous data after this! Of course, if you have a backup, then restore the backup, so that your apple is the same as before you did not brush ios7GM!