Home / Tutorials / Unlock iOS 4.3.3 on iPhone 4, 3GS Using Ultrasn0w 1.2.3 [Tutorial]

Unlock iOS 4.3.3 on iPhone 4, 3GS Using Ultrasn0w 1.2.3 [Tutorial]

Ultrasn0w 1.2.3 has been released today to make the Unlock compatible with iOS 4.3.3 on iPhone 4 and 3GS, running on the old baseband.

Supported basebands: 01.59.00 / 04.26.08 / 05.11.07 / 05.12.01 / 05.13.04 / 06.15.00

Unsupported basebands : 02.10.04 / 03.10.01 / 04.10.01 / 05.14.02 / 05.15.04 / 05.16.02

iPhone 3GS users: You have to jailbreak your iPhone on 6.15.00 basebands on iOS 4.1 / 4.2.1, you can follow for PwnageTool Mac or guide for RedSn0w Windows / Mac (You may lose your GPS) Take step by step to unlocking below…

Note: Updating iPhone 3GS baseband to iPad’s 06.15.00 might result in loss of GPS functionality.

Step 1: First up, you will have to jailbreak your iPhone 4 or 3GS on iOS 4.3.3 and preserve the old baseband using either PwnageTool on Mac, or Sn0wbreeze on Windows. Instructions on how to jailbreak iOS 4.3.3 using PwnageTool can be found here, and for Sn0wbreeze can be found here.

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:

Cydia Home Sources

Step 3: Go to Manage->Sources manage Step 4: Now tap on “Edit”, then tap on “Add” and Enter the following repo http://repo666.ultrasn0w.com Add source Step 5: Now tap on “Add Source” then tap on Done. Updating sources Reloading data Step 6: Search for “ultrasn0w ” in Cydia and install this application. This app will automatically unlock your iPhone so that you can use it with any carrier. manage search ultrasn0wUltraSn0w 1.2.3


Step 7: Now simply restart your iPhone and you should now have a fully unlocked iPhone 4 or 3GS/3G, running iOS 4.3.3.

Step 8: Now press the Home button then power off and power on the iPhone. You do this by holding down the power button for 3 seconds then moving the power slider that appears to the right. Press the power button again to turn on the phone. power off iphone You should now be able to insert the SIM of your choice!

iPhone on Fido

iPhone on rogers

***THANKS: A big thank you to all the members of the iPhone Dev-Team for all their hard work! It is much appreciated by all.

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