Ultrasn0w 1.2.7 Released to Unlock iPhone 4, iPhone 3GS on iOS 5.1.1

ultrasn0w-1.2.7

The official Ultrasnow 1.2.7 update is finally here to unlock iOS 5.1.1 on iPhone 4 and iPhone 3GS. As usual this update of Ultrasn0w doesn’t include the support for any baseband. It will work on already unlockable basebands only.

ultrasn0w-1.2.7

The previous version didn’t support iOS 5.1.1 officially but we could unlock our devices by using a trick which involves installing an Ultrans0w fixer before install the actual Ultrans0w unlock. However, this new ultrasnow 1.2.7 version doesn’t require any additional cydia package. After installing a custom iOS firmware, you can simply install the latest ultrasn0w package to unlock your device.

How to Unlock iOS 5.1.1 with Redsn0w 1.2.7:

Step 1: First of all backup your device.

Step 2: Now cook a custom firmware while preserving the baseband. For this purpose, you can either use Redsn0w or Sn0wbreeze.

Step 3: After you have installed the custom iOS 5.1.1 firmware on your device, launch Cydia.

Step 4: Go to Changes tab and press the “Refresh” button on top-left to retrieve the latest packages from cydia servers.

Step 5: Now search for Ultrasn0w 1.2.7 and install it.

Step 6: Reboot your device.

After your device reboots, you’ll get the signal back on your iPhone 3GS/iPhone 4.

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