Ultrasn0w was updated to support old baseband on new iOS 4.3.3.
Here is the list of supported basebands:
Ultrasn0w 1.2.3 (for unlockers with old baseband) is available in Cydia.
You can update to iOS 4.3.3 and preserve old baseband using two utilities. Here are step-by-step instructions:
PwnageTool 4.3.3.1 (Mac OS)
Sn0wBreeze 2.7.3 (Windows)
The iPhone Dev-Team released an update to UltraSn0w that makes it compatible with iOS 4.3.1 for basebands previously unlocked. You can use ultrasn0w if you need carrier unlock and you have compatible baseband, preserved with pwnagetool, sn0wbreeze or tinyumbrella.
Ultrasn0w 1.2.1 supports only the following basebands:
You can install ultrasn0w via Cydia.
Here are DevTeam comments:
DevTeam released much anticipated untethered jailbreak for the latest iOS 4.3.1 – RedSn0w 0.9.6 rc9 and PwngeTool 4.3.
The 4.3.1 untether works on all Apple devices that support 4.3.1 except for the iPad2:
Redsnow is easy to use, it is available for Windows and Mac OS. Pwnagetool can be used to create custom ipsw and preserve baseband, it supports Mac OS only.
You can download RedSn0w 0.9.6 rc9 here and PwnageTool 4.3 here.
Here are our tutorials:
Ultrasn0w doesn’t work on iOS 4.3.1 yet (even with iOS 4.3.1 + old baseband). The fix will be available soon. Here’s a warning from DevTeam for unlockers:
![redsn0w 096b5 top Step by step Tutorial: How to Jailbreak and Unlock Your iPhone 3GS Using RedSn0w 0.9.6b5 (Windows) [iOS 4.2.1]](http://ultrasn0w.ru/wp-content/uploads/2010/11/redsn0w-096b5-top.png "redsn0w-096b5-top")
This is step-by-step instructions on how to jailbreak and unlock your iPhone 3GS on iOS 4.2.1 firmware using RedSn0w 0.9.6b5 for Windows.
For iPhone 3G use this tutorial.
If you have an iPhone 3GS with the new bootrom you will only be able to perform a tethered jailbreak at this time. This means you will need Redsn0w’s assistance to boot into your jailbroken device.
IMPORTANT FOR UNLOCKERS
During this process you can update your baseband to the 06.15 version. If you are on 05.14 or 05.15 or higher you will need to do this to unlock. You do not need to do this for jailbreak only. Please read the following very carefully before deciding whether to do this.
![redsn0w 096b5 top Step by step Tutorial: How to Jailbreak and Unlock Your iPhone 3G Using RedSn0w 0.9.6b5 (Windows) [iOS 4.2.1]](http://jailbreak-iphone.ru/wp-content/uploads/2010/11/redsn0w-096b5-top.png "redsn0w-096b5-top")
This is step-by-step instructions on how to jailbreak and unlock your iPhone 3G on iOS 4.2.1 firmware using RedSn0w 0.9.6b5 for Windows.
For iPhone 3GS use this tutorial.
IMPORTANT FOR UNLOCKERS
During this process you can update your baseband to the 06.15 version. If you are on 05.14 or 05.15 or higher you will need to do this to unlock. You do not need to do this for jailbreak only. Please read the following very carefully before deciding whether to do this.