The way to Release iPhone four, 3GS iOS four.three.1 with Ultrasn0w 1.2.1

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The Dev Group crew liberate ultrasn0w 1.2.1 as mentioned yesterday to suport iOS 4.3.1 and iPhones running old baseband. The method below will help you step by step unlock your iPhone.

Note that ultrasnow 1.2.1 is not a newer iPhone unlock, rather fixes compatibility and single bar issues on existing iPhone with preserved basebands  01.59.00 / 04.26.08 / 05.11.07 / 05.12.01 / 05.13.04 / 06.15.00) on iOS 4.3.1 using PwnageTool or Snowbreeze.

Step 1: Jailbreak your iPhone 4 or iPhone 3GS and preserve your baseband with Pwnagetool or Snowbreeze

Step 2: Once the iPhone Jailbreak is done, you can proceed with Ultrasnow 1.2.1 from cydia

  • Start “Cydia” on your iPhone.

  • Touch on “Manage” tab on the bottom.

  • Now touch on “Sources” as seen in the screenshot below:

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  • Touch on “Edit” and then on “Add”. You will be prompt enter a url source. Type http://repo666.ultrasn0w.com” and touch on“Add Source” to add the repo.

345-501

Cydia  and your sources will be updated  by following a series of automated steps.

  • After everything is completed. Search for “ultrasn0w 1.2.1” in Cydia and install the application. This app will automatically unlock your iPhone so that you can use it with any carrier.

Ultrasn0w 1.2.1

Step 3: Restart your iPhone, your iPhone 4 and iPhone 3GS running on iOS 4.3.1 sould be successfully unlocked

 

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