Re: Iphone 4 Help needed
There is possibly one other option. Download TinyUmbrella or iFaith and connect the device. Use either of these to see if it has any of the saved SHSH blobs/Aptickets saved. If so, you may be able to downgrade the phone to a signed iOS 6.1.2 or lower and then re-unlock the phone after you jailbreak it. This is a very complex way though so I would recommend looking for a video tutorial on YouTube or finding a step-by-step walkthrough online.
Originally Posted by iMore Question
Since it was a jailbroken unlock, not a carrier unlock, the chances of having the saved SHSH blobs and apticket for a jailbreakable firmware are very high. Good luck my friend.
***This will only get you to a jailbreakable firmware, not an unlockable baseband. My bad. Sorry.