She bought a iPhone from someone that was apparently jailbroke and she didn't know it but when she started having problems she tried restoring thru iTunes. The phone is an older iPhone 3G. Now the iPhone will not update and fails after it gets almost done thru iTunes. I guess because something has updated and cannot be downgraded. The error code was 1015. So what should we do? The phone is locked at the screen with the iTunes logo and the USB cord. Ideas for someone that is computer friendly but hasn't messed with jailbroken devices but on several occasions.