I have an iPhone 4 jailbroken on 4.2.1 with modem firmware 01.59.00. Is it possible to upgrade to 5.0.1? I have tried several different ways but I keep running into itunes errors like 1604 ect. My guess is that I am out of luck since this software is no longer being signed, but I thought I would ask you smart guys and gals before giving up.
thank you,
Alan
thank you,
Alan