Unlocking iPhone 4 / 3G / 3GS with firmware 4.3.3 using Ultrasn0w

In this video I explain how you can unlock your iPhone 4 / 3G / 3GS using Ultrasn0w which you can download in Cydia. This video is based on the fact that you have jailbroken your iPhone and that your iPhone has one of the following modem firmware / basebands: iPhone 4: 01.59.00 iPhone 3G / 3GS: 04.26.08 – 05.11.07 – 05.12.01 – 05.13.04.