How to Unlock iPhone 4 and iPhone 3GS on iOS 6.1

12 February 2013, 4:33 pm EST By Jimmie Geddes email: Mobile & Apps

The evasi0n iOS 6.X jailbreak finally offered a jailbreak solution for iOS 6 devices, including extremely hard-to-jailbreak devices like the iPhone 5, iPad mini, and iPad 4. The team has also just released a new application on Cydia that allows you to unlock the iPhone 4 and iPhone 3GS. The iPhone 5 and iPhone 4S are not supported, as the basebands on those smartphones will not work with the tool. LetsunlockiPhone has put together the requirements and a step-by-step tutorial on how to unlock your iPhone. You'll have to make sure your iPhone 4 and iPhone 3GS is running a baseband that will work with the unlocking tool.

Supported Ultrasn0w Fixer for iOS 6.1 Baseband

iPhone 4

  • 01.59.00

iPhone 3GS

  • 04.26.08
  • 05.11.07
  • 05.13.01
  • 05.12.01o
  • 06.15.00

Step 1. After jailbreak you need to install Ultrasn0w 6.1 package. To perform this open Cydia => Manage => Source => Edit=> Add this repo:

Step 2. Go to Search, find official Ultrasn0w Fixer 6.1 and install it.

Step 3. Go to Search again and install official Ultrasn0w 1.2.8 Download and Install adding this repo:

Step 4. After installation process you need to restart your iPhone.

Step 5. After device will reboot; wait for the signal.

After you get the signal of your network, your iPhone 4 and iPhone 3GS will be running Ultrasn0w fixer unlock iOS 6.1 device.

You can find more information at Letsunlockiphone.


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