How to Jailbreak iPhone 4.3.1 with ultrasn0w
Jailbreak for iPhone 4.3.1 has just been released by The Dev Team. The version ultrasn0w has got the support for iPhone 3GS and iPhone 4 and now that are exclusively using these baseband.

In this we will tell you how to Jailbreaking your iPhone 4 on any of the basebands which has got the latest iOS 4.3.1. Before moving ahead, make sure that your iPhone is of one of the basebands. If not, this is not going to work for you. You need to wait for some more time. Then check that your iOS is updated to the latest version i.e. iOS 4.3.1. After it gets updated to version 4.3.1 then ultrasn0w is all set to unlock your phone. You need the latest version of ultrasn0w i.e. ultarsn0w 1.2.1.
Follow the following steps to unlock your iPhone 4.3.1:
- The first thing you need to do is to jailbreak and update your iPhone 4.3.1 with PwnageTool.
- Once you are updated to iOS 4.3.1, launch Cydia, go to Manage > Sources > Edit > Add, and type in the following repo: http://repo666.ultrasn0w.com. This will unlock your iPhone by installing ultrasn0w in the phone.
- Make sure that you reboot your phone after installing ultrasn0w on your iPhone.
That’s all you need to do. You have unlocked your iPhone 4.3.1 in few minutes.

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