Hi, I have an Iphone 4 GSM, it's on 5.0.1, jailbroken, and unlocked via ultrasn0w. It has never been upgraded beyond 5.0.1. I want to upgrade it to 6.1.2 (jailbroken and preserve baseband, of course). Since Apple has stopped signing iOS 6, is it still possible to upgrade to 6.1.2? Not upgrading to 6.1.3 as there's no untethered JB that allows baseband preservation. thank you.