How-To Unlock iOS 5.1.1 On iPhone 4 And iPhone 3GS Using Ultrasn0w Fixer

The cat and mouse game between Apple’s security team and the many hackers of the jailbreak scene is never more obvious when a new iteration of iOS is released. Only hours ago did the fruit company seed iOS 5.1.1 to the end-user, and already the various dev teams are bringing updates to their respective unlock and JB utilities.

The new iteration of Apple’s mobile OS doesn’t bring anything particularly riveting in terms of changes, with most of the entries to the changelog citing bug fixes and performance improvements. Those with older basebands and reliant on the Ultrasn0w unlock will be pleased to know that the Ultrasn0w Fixer has been updated to support iOS 5.1.1, and as usual, we’ve got the step-by-step guide to go about the process.

Unlock iPhone

Ultrasn0w currently supports following iPhone 4 and iPhone 3GS basebands:

  • 01.59.00
  • 04.26.08
  • 05.11.07
  • 05.13.01
  • 05.12.01
  • 06.15.00

The official version of Ultrasn0w itself will be updated in due course, but until then, a developer has a quick fire solution to get you unlocked on iOS 5.1.1 in the form of his Fixer and unofficial Cydia package.

NOTE: Your iPhone must be jailbroken on iOS 5.1.1 using custom firmware with old baseband preserved. You can can follow our tutorial for jailbreaking here.

Step 1: In Cydia, browse to Manage and select Sources.

Step 2: Select Edit and Add to add the required repository. Type into the pop-up, then press Add Source.

ultrasn0w fixer 5.1.1 iOS

Step 3: After the repo has been added, open it in the source list which will display the Ultrasn0w Fixer 5.1.1 utility. Select the Fixer utility, and tap the Install button located in the top right hand corner. It shouldn’t take more than a few seconds to install.

ultrasn0w fixer 5.1.1 iOS repo package

Step 4: Once complete, the latest official version of Ultrasn0w, which is version 1.2.5, needs to be installed. Select Search in Cydia, type in "Ultrasn0w" and search the package.

Step 5: Once you’ve found it, install it and you are done!

Before we leave you, it’s worth mentioning that, in the words of the developer, the Fixer must be installed before official version of Ultrasn0w, and not the other way around. Usually, a fix for an app or tweak is applied thereafter, so the way this particular process works breaks the regular mold.

(Thanks Xchester for the hat tip!)

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