I need some help upgrading my jail broken iphone 3g 3.0 to 3.1.2 using windows xp. This is my current version information.
iphone 3g with
version 3.0 (7A341)
Modem Firmware: 04.26.08
Jail broke and unlocked using redsnow and ultrasnow.
What is the best way for me to upgrade to 3.1.2 and keep my jailbreak and unlock?
I don't have access to a mac so need a windows xp solution.
What ipsw file I will need to download?
thanks for the help