My brother wants me to sell his 3GS MC model. To get a little more money, I think we should update to 4.1.
He's on 4.0.1 with modem firmware 05.13.04.
From what I've looked up, I can build a custom IPSW with Pwnagetool, preserving the baseband, and use Ultrasn0w to unlock. Is this correct?
He's on 4.0.1 with modem firmware 05.13.04.
From what I've looked up, I can build a custom IPSW with Pwnagetool, preserving the baseband, and use Ultrasn0w to unlock. Is this correct?
