Ultrasn0w 1.2.1 has been released to unlock iPhone 4 and iPhone 3GS on iOS 4.3.1 firmware. Check out the below How To Guide to unlock your device. Ultrsn0w 1.2.1 unlock lower basebands whose unlock was already possible but broken on iOS 4.3.1.
If you have upgraded to iOS 4.3.1 firmware and jailbroken you device with PwnageTool 4.3 or Sn0wbreeze 2.5 and requires an unlock then you can use Ultrasn0w 1.2.1. Check out the compatible baseband list below.
Compatible basebands with Ultrasn0w 1.2.1:
iPhone 4: 01.59.00
iPhone 3GS: 04.26.08 / 05.11.07 / 05.12.01 / 05.13.04 / 06.15.00
DO NOT USE WITH the following basebands:
iPhone 4: 02.10.04 / 03.10.01 / 04.10.01
iPhone 3GS: 05.14.02 / 05.15.04 / 05.15.04 / 05.16.01 / 05.16.02
Remember you need to have a jailbroken device with PwnageTool 4.3 and Sn0wbreeze 2.5. You can get the following gudies if you have not already jailbroken your device on iOS 4.3.1.
How To Guides for Untethered 4.3.1 Jailbreak on Windows & Mac
- How to Guide For Untethered iOS 4.3.1 Jailbreak on Mac with PwnageTool 4.3
- How to Guide For Untethered iOS 4.3.1 Jailbreak on Windows with Sn0wbreeze 2.5
After jailbreaking 4.3.1 using above guides, you can unlock iOS 4.3.1 with Ultrasn0w 1.2.1. Here is how to do it.
How to Guide To Use Ultrasn0w fixer for iOS 4.3.1 to Unlock iPhone 3GS
Step 1: Launch Cydia on your jailbroken iPhone 3GS.
Step 2: Navigate to “Manage” and then “Sources”
- Now “Edit” and then “Add”.
- Type the repo: “http://repo666.ultrasn0w.com”
- Now “Add Source”
Step 6: Once its done with installation, find “Ultrasn0w 1.2.1”. Select and to install the package. After that it will restart your device.
Thats it! Congratulations! Your device is now unlocked on iOS 4.3.1 on basebands 01.59.00 / 04.26.08 / 05.11.07 / 05.12.01 / 05.13.04 / 06.15.00. Kindly DO NOT use it other than the mentioned basebands.
For iPhone 4 users: How To Unlock iPhone 4 4.3.1 After iOS 4.3.1 Jailbreak
We cover all jailbreak and unlock news. Proof is our homepage VeryRite.com. Make sure you follow us.