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iPhone Dev Team has just rolled out the official version of PwnageTool 4.2, which incorporates the new kernel based exploit to create full untethered iOS 4.2.1 custom firmware files. PwnageTool is a freeware that creates custom IPSW to jailbreak your iPhone, iPad, iPod touch and Apple TV, preserving your iPhone baseband to make you able to unlock your device with Ultrasn0w tool.

The list of supported devices includes;

* iPhone 3G
* iPhone 3GS
* iPhone 4
* iPhone 4 Verizon
* iPod touch 3G
* iPod touch 4G
* iPad
* Apple TV 2G

Download PwnageTool 4.2.

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