Dev-Team has released UltraSn0w 0.93 to unlock iPhone 3GS iOS 4.0 with baseband 05.13.04. Yes! you can unlock iPhone 3GS baseband 05.13.04 running iOS 4 with UltraSn0w 0.93 unlock. In this guide you’ll learn how to unlock iPhone 3GS 05.13.04 baseband.