Unfortunately, we updated a 3g iphone in itunes this morning and now it's in restore mode and won't recognize the tmobile sim. Purchased this phone used on ebay and it was already jailbroken and unlocked. How do we get it back to tmobile's service and out of the restore mode? I've looked at countless videos on Utube, but to no avail. Please HELP! (It has a black back to it).