Unlock network to iPhone 4, 3GS for version ios 4.3.1

Unlock iOS 4.3.1 with UltraSn0w 1.2.1 [iPhone 4, 3GS]

After jailbreak Cydia open and I am looking for:

ultrasn0w

Network for iPhone for version 4.3.1

install:

Bespand for:

01.59.00 / 04.26.08 / 05.11.07 / 05.12.01 / 05.13.04 / 06.15.00

 then Restart