Sunday, March 13, 2011

Unlock iOS 4.3 With Sn0wbreeze Which Preserve Baseband

by Mahmoud Sabry on Sunday, March 13, 2011 in Baseband, iOS 4.3, Sn0wbreeze, Unlock

Upgrade your iPhone 4, 3GS, and iPad to iOS 4.3 [iPad 2 Not Supported] without upgrading your original baseband and unlock it via Ultrasn0w . Snowbreeze 2.3 beta 1 jailbreak utility is available for download that can be used to preserve baseband while upgrading the iOS on your device.

Note :
Do not use Snowbreeze to jailbreak your device yet . iOS 4.3 is not compatible to work with MobileSubstrate. You will need an updated MobileSubstrate to make your favorite jailbreak apps like BiteSMS , WinterBoard Themes , SBSettings to work on iOS 4.3 . If you still decide to jailbreak , the above apps will stop functioning. Read the complete list of incompatible apps .
If you want jailbreak to carrier unlock your phone on 01.59.00 using Ultrasnow 1.2 , this tutorial is for you . We are only using the “Baseband Preservation Mode” to upgrade your device to the latest firmware and not jailbreak it .
Required :

Compatibility :

iPhone 4 3GS
Ipod Touch 4 3G
Ipad 1G Only

Follow these steps to upgrade your iphone preserving the original unlocked firmware :

Download 4.3 ipsw file
Download Snowbreeze 2.3 and launch the program on your windows pc under Administrator Mode [right-click on the application icon and select Run As Administrator]
Select Baseband Preservation Mode as and select the downloaded ipsw file in Step 1
Allow Snowbreeze 2.3 to custom build your firmware .
After the build is complete start iTunes 10.2.1 . Now press and hold Shift Key and click on Restore on the iTunes window [as shown in the image below] and restore your iphone to the custom-built firmware . When asked , select the 4.3 ipsw file created by Snowbreeze .
Your device will now reboot for the changes to take place . Use Ultrasnow 1.2 to unlock your phone on old preserved baseband .