The Ultrasn0w 0.92 was released some days ago to unlock iPhone 3G/3GS with iOS 4 on baseband 04.26.08.Unlock iPhone 3GS iOS 4 (Any Baseband) But now the newer version of Ultrasn0w, 0.93 has been released to unlock iPhone 3G/3GS with latest basebands 05.13.04 ( iOS 4 ) and 05.12.08 (3.1.3 firmware).Â

If you want to unlock your iPhone 3GS with iOS 4, first you have to jailbreak it. Read the below guide to jailbreak your iPhone 3GS with iOS 4.

How to jailbreak iPhone 3G/3GS with iOS 4

Now follow the steps given below to unlock iPhone 3GS iOS 4.

1. After jailbreaking your iPhone, launch Cydia.

2. Tap on ” Manage “.

3. Now tap on ” Sources “.

4. Choose ” Edit and then ” Add “.

5. Then add this source : ” repo666.ultrasn0w.com “.

Now Cydia updates your sources.

6. Then search for ” ultrsn0w 0.93 ” and install it on your iPhone 3GS to unlock it.