Now with the release of the all new iOS 5.1 the dilemma of a possible Unlock for iPhone 4 and 3GS had started with the iPhone Dev Team already warning iDevice users not to upgrade to iOS 5.1 without the custom built firmware. Now within a week of the release of the new OS we already have the Unlock for iOS 5.1 and the fix is called as Ultrasn0w Fixer.
However this may sound awesome for those wish to unlock iPhone 3GS and iPhone 4 on iOS 5.1 but the new fix does not bring support to any new basebands but instead it will support all the previous basebands supported by Ultrasn0w 1.2.5.
The supported based basebands are :
The Untrasn0w is however slated to be released within few days and by that time you can install the Ultrasn0w Fixer which has been created by a developer known as zmaster and it is used to unlock iOS 5.1 devices based on A4 chip.
To Unlock iPhone 4 or iPhone 3GS on iOS 5.1 you need to Jailbreak your device. For a detailed tutorial on how to Jailbreak your A4 chip based iOS 5.1 device using Redsn0w click here and to know more about Sn0wbreeze for Windows click here.
How To Unlock iOS 5.1 iPhone 4 / iPhone 3GS With UltraSn0w Fixer :
Step 1 : Launch Cydia on your iOS 5.1 device and click on ‘Manage‘ and head to ‘Sources’ . You will find Manage at the tool bar at the bottom of the application.
Step 2 : Now tap the ‘Edit‘ option and then select ‘Add‘.
Step 3: In the pop up menu that appears enter the URL ‘http://repo.iparelhos.com‘, then press ‘Add Source‘.
Step 4 : Once the Repo list is refreshed and it is added tap on it and select the App named Ultrasn0w Fixer and tap on Install.
Step 5 : Now once the fixer is installed you need to install the current Ultrasn0w 1.2.5 and you can do so by going to Search in Cydia and enter ‘Ultrasn0w‘ and hit the search button and once found click on ‘Install’ and complete the installation process. However it should be noted that the fixer should be installed before installing the Ultrasn0w 1.2.5.
That’s it !!! Once completed you have completed the process to Unlock iOS 5.1 iPhone 4 or iPhone 3GS with the supported basebands.
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