(Last Updated On: September 30, 2012)
Good news guys!
UPDATE: If you’re using an AT&T iPhone, you can officially unlock it now so that you won’t to do all these. Click here.
Untethered jailbreak for iOS 4.3.1 using redsn0w 0.9.6rc9 is now available for download:
What you need:
redsn0w_win_0.9.6rc9.zip Windows or
iPhone2,1_4.3.1_8G4_Restore.ipsw iPhone 3GS iOS 4.3.1 IPSW or
iPhone3,1_4.3.1_8G4_Restore.ipsw iPhone 4 iOS 4.3.1 IPSW
There are some issues Musclenerd warns with ultrasn0w:
“ultrasn0w unlockers remember: please stay away until we get a chance to fix the problems 4.3.1 has with older basebands”
” … you’ll be stuck with just one bar of signal strength being shown (despite actual strength), so probably better to wait”
For iPhone 3GS users stuck on baseband 5.16.02 and wish to update to baseband 6.15.00, download the files above and follow this guide here or here.
For iPhone 4 users, download the files above and follow on screen instructions with redsn0w.
Detailed instructions with screenshots to follow.