Unlock iPhone 3gs on 4.3.1

To work around with the unlock issues on ios 4.3.1. Unlock your iPhone 3gs, 3g on 4.3.1 if you have an old baseband.

1. Download UltraSn0w 1.2 from Cydia (Source: repo666.ultrasn0w.com)

2. Download ultraSn0w fixer for 4.3.1 from Cydia (Source: djayb6.com)

If you are having any other issues. Please let me know in the comments section.