Thu. Aug 18th, 2022

How To Unlock iOS 4.3 on iPhone 4, iPhone 3GS with Ultrasn0w fixer and Sn0wbreeze 2.3b4

As we recently informed that iH8sn0w is managed to implement Ultrasn0w fixer tool in next version of Sn0wbreeze 2.3, as he promised that he will release the fix with the new version of Sn0wbreeze 2.3b4, So today he kicked out the Sn0wbreeze 2.3b4 with Ultrasn0w fixer. Earlier we informed on the release of iOS 4.3 that Apple has managed to fix the Mobile Substrate which is required to run many apps from Cydia and as well as UltraSn0w, but some days ago, Saurik has released the fix of Mobile Substrate which allows us to run all infected app on iOS 4.3 but still not ultrasn0w.


So yesterday, iH8sn0w announced that he will release fix for the UltraSn0w with the name of ultrasn0w fixer. So now with the new version of Sn0wbreeze 2.3b4 you can unlock the iPhone 4, iPhone 3GS on the following basebands (01.59.00 / 04.26.08 / 05.11.07 / 05.12.01 / 05.13.04 / 06.15.00).


What comes in Sn0wbreeze 2.3b4:

  • ultrasn0w now works for basebands (01.59.00 / 04.26.08 / 05.11.07 / 05.12.01 / 05.13.04 / 06.15.00)
  • ultrasn0w is NOT compatible with the folllowing basebands! (02.10.04 / 03.10.01 / 04.10.01 / 05.14.02 / 05.15.04)
  • Upgrading your iPhone 3GS baseband to the 06.15.00 iPad baseband hack to unlock MAY cause you to lose your GPS!
  • Fixed minor GUI + iBooty bugs.

Here is the complete step by step guide on how to unlock the iPhone 4, iPhone 3GS with Sn0wbreeze 2.3b4:


Step 1: First of all cook a custom firmware for your device running iOS 4.3 using latest version of Sn0wbreeze 2.3b4 and update your device with the custom iOS 4.3 firmware version. Download Sn0wbreeze 2.3 b4 from here

Note: Sn0wbreeze 2.3b4 can also jailbreaks your device running on iOS 4.3 but still it provides you tethered jailbreak which means on every boot of your device you have to attach it with your machine.

Step 2: After Jailbreaking your device, launch Cydia under from your Springboard.

Step 3: Tap on Manage and Select Sources, Now hit the edit button and then on Add to add ultrasn0w source.

Step 4: After clicking on add, a box will appeared prompting you to add the source:

Step 5: After Adding the source, now search Ultrasn0w from the search bar and install it.

Step 6: After the installing process just restarts your iPhone and now you were on unlocked iPhone 4 running on iOS 4.3