Unlock iOS 4.3.3 with New Ultrasnow 1.2.3 on iPhone 4, 3G & 3GS [Tutorial]

By on May 6, 2011

You can now unlock iOS 4.3.3 new Ultrasn0w 1.2.3  which has been released by iPhone Dev Team for iPhone 4, 3G & 3GS running on the old basebands.

Ultrasn0w 1.3.2-Unlock-iphone 4-3G-3GS

It should be kept in mind that Ultrasn0w 1.2.3 is only an update (not the new one) and can’t unlock the iPhones with newer basebands. It only fixes the compatibility issues on the current devices which has been jailbroken on 01.59.00 / 04.26.08 / 05.11.07 / 05.12.01 / 05.13.04  / 06.15.00 preserved basebands using PwnageTool 4.3.3.

An Alert for iPhone 3GS Users Only:

Ultrasn0w 1.2.3 unlocking only works if your iPhone 3GS is jailbroken with 06.15.00 baseband. You can follow the complete Redsn0w 0.9.6b5 tutorial  to update your iPhone 3GS baseband to 06.15.00 and jailbreak it on iOS 4.1 / 4.2.1 prior to go ahead with following tutorial. It should also be noted that updating iPhone 3GS baseband to iPad’s 06.15.00 might result in loss of GPS functionality too.


Firstly, Jailbreak your iPhone 4, 3G & 3GS on iOS 4.3.3 untethered with PwnageTool 4.3.3.


After jailbreaking, you can unlock your iPhone 4, 3G & 3GS on basebands listed on the top of this post using Ultrasn0w 1.2.3.


Launch “Cydia on your iPhone 4/3GS.


Open “Manage” tab.


Then open “Sources” as shown below;

iPhone 4-3GS Unlock-Ultrasn0w


Open “Edit” & then tap on “Add”.


Put http://repo666.ultrasn0w.com in URL box and touch on “Add source”.

iPhone 4-3GS Unlock-Ultrasn0w


Cydia will automatically update your sources. Just relax and wait for next step patiently.


Now start Cydia, search for “Ultrasn0w 1.2.3” and install it.

Ultrasn0w-Unlock iOS 4.3.3


Restart your iPhone 4, 3G & 3GS to finalize the whole process.

Congratulations! You have done the job successfully. Now you can use your iPhone 4, 3G & 3GS on iOS 4.3.3 with any carrier since it has been unlocked.

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