How to Unlock iPhone 3GS Firmware 4.1

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In order to jailbreak iOS 4.1 on iPhone 3GS New bootrom, it must be jailbroken on iPhone OS 3.1.2 using Pwnagetool or Redsn0w or Blackra1n but not using JailbreakMe or Spirit userland jailbreak. If you meet above criteria then only proceed. We will not be responsible for any damage that may happen to your device

Now it is time to unlock iPhone 3GS 4.1 firmware. Follow the steps given below to unlock iPhone 3GS 4.1 firmware.

1. Jailbreak iPhone 3GS on iOS 4.1.

2. Launch Cydia.

3. Choose the ” Manage ” tab at the bottom.

4. Choose the ” Sources ” option.

5. Tap the ” Edit ” button and then on the ” Add ” button.

6. Then add the source ” http://repo666.ultrasn0w.com “.

7. After the source is added, search for ” ultrasn0w 1.1-1 ” in Cydia.

8. Install the Ultrasn0w 1.1-1 app to unlock iPhone 3GS 4.1 firmware.

9. Restart your iPhone 3GS.


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Posted in: Cydia,Firmware,IOS (Apple),IOS jailbreaking,IPhone,iPhone 4,iPhone Dev Team,PwnageTool