Ultrasn0w  1.2.three permits free up iPhone 3G /four iOS four.three.three below sure prerequisites. Explanations and small print after the soar.

Word : Ultrasn0w 1.2.three shouldn’t be a brand new software for désimlockage new baseband. The replace simplest fixes compatibility concerns and operates beneath iOS four.three.three jailbroken with basebands preserved following: 01.fifty nine.00 / 04.26.08 / 05.eleven.07 / 05.12.01 / 05.thirteen.04 / 06.15.00.


  • four & iPhone jailbroken iPhone 3G four.three.three in iOS
  • Baseband 01.fifty nine.00 / 04.26.08 / 05.eleven.07 / 05.12.01 / 05.thirteen.04 / 06.15.00

Updating iPhone 3GS baseband to iPad’s 06.15.00 would possibly lead to lack of GPS performance.

Step 1: First up, you’ll have to  jailbreak your iPhone four or 3GS on iOS 4.3.3 and preserve the old baseband using either PwnageTool on Mac, or Sn0wbreeze on Windows.  

Step 2: Once you are done with the jailbreak, you can now unlock your iPhone on the supported basebands using Ultrasn0w 1.2.3 from Cydia. To do this:

  • Start “Cydia” on your iPhone.

  • Touch on “Manage” tab on the bottom.

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


  • Touch on “Edit” and then on “Add”. You will be prompted to enter a url source as seen in the screenshot below. Type http://repo666.ultrasn0w.com” and touch on“Add Source” to add this repo if you haven’t already.


Cydia will now automatically update your sources by following a series of automated steps.

  • After installation is completed. Search for “ultrasn0w 1.2.3” in Cydia and install  this application. This app will automatically unlock your iPhone so that you can use it with any carrier.


Step 3: Now simply restart your iPhone and voila! you should now have a fully unlocked iPhone  4 or 3GS, running iOS 4.3.3 !

For more  coverage on iHelplounge: 


Click Here - For Jailbreak Video

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