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:

• iPhone3G
• iPhone3GS
• iPhone4
• iPhone4-Verizon
• iPod touch 3G
• iPod touch 4G
• iPad
• AppleTV 2G

Jailbreak is even improved compared to GreenPois0n RC6:

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Thanks to Dev Team and the porting work of Jay Freeman as well as the authors of 3Proxy, it is now possible to “tether” your iPhone 3G and use its Internet connection on your laptop.

Warning – Tethering your iPhone is against the iPhone data plan terms. AT&T could slap you with huge fees if you overuse this. I recommend only using it during emergencies.

Here is a basic plan (by the way, this should work for old IPhone also):

• Jailbreak your iPhone 3G
• Install 3Proxy and Terminal
• Create an ad-hoc Wi-fi network using your laptop
• Join the network with your iPhone
• Find the iPhone’s IP address
• Open Terminal and run the proxy program
• Open Safari on your iPhone and open a web page
• Configure your browser to use the proxy

Later we’ll discuss it with more details.

Step 1: Jailbreak your iPhone

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