Hello i'm trying to update my jailbreked iphone 5.1 with unlock (ultrasn0w) to a 6.1.x version
New Bootrom (3rd to 5th S/N) xx946xxxxx
Need to Unlock (ultrasn0w) and my Base Band is 05.13.04 also i dont have the original sim card.
I cant find any good tutorial how to do it correctly cause if my base bands updates i'll get a iPod Touch :(
Can anyone help me please?