DevTeam released PwnageTool 4.2 utility. It is able to create a custom IPSW that can perform an untethered jailbreak on iOS 4.2.1. As usual it can preserve baseband version for unlockers. Devteam used the same method that was implemented in greenpois0n.
PwnageTool supports all 4.2.1 devices other than iPod touch 2G:
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.
The iPhone DevTeam have probably found a new method to jailbreak Apple devices with the A4 chip. This includes such devices as iPhone, iPad, iPod and Apple TV. This is great news!
MuscleNerd tweeted.
Think we’ve figured out a way to extend PwnageTool+limera1n+@comex hacks to untethered JBs for all future A4 firmwares 🙂
DevTeam has announced that iPod Touch 2G is finally jailbreaked.
The raw patch to the firmware that transforms the “tethered” jailbreak into an untethered one was released but it’s not yet packaged up into the PwnageTool or QuickPwn flows. But other threads there are pulling together tutorials and other tips for those of you anxious to try this out now. For the curious, the hole itself is explained .
![Step-by-step Tutorial: How to Jailbreak and Unlock Your iPhone 3GS Using RedSn0w 0.9.6b5 (Windows) [iOS 4.2.1]](http://pwnagetool.ru/wp-content/uploads/2010/11/redsn0w-096b5-top.png)
