Popular jailbreak and unlock utility PwnageTool 4.2 has been released and includes the untethered iOS 4.2.1 jailbreak in addition to resolving the iBooks DRM problem and some WiFi connectivity issues with the Apple TV 2.

PwnageTool 4.2 supports jailbreaking nearly all iOS devices including iPhone 3G, iPhone 3GS, iPhone 4, Verizon iPhone 4, iPod touch 3g, iPod touch 4G, iPad, and Apple TV 2. The only device that PwnageTool will not work on is the iPod touch 2G.

PwnageTool 4.2 is particularly important to those who rely on an iPhone unlock, since PwnageTool allows users to preserve existing unlocked baseband while allowing users to upgrade their device to iOS 4.2.1.

Download PwnageTool 4.2 Untethered for iOS 4.2.1

Currently for Mac OS X only:

We will update download link as they become available.