As we reported earlier, both PwnageTool 4.2 for Mac and Sn0wbreeze 2.2 for Windows are now available which can preserve baseband, and jailbreak iPhone, iPad and iPod touch on iOS 4.2.1 firmware.
This new version of PwnageTool and Sn0wbreeze also incorporates kernel based GreenPois0n
exploit, which means that you can now create untethered 4.2.1 custom
firmware files without the upgraded baseband so that you can unlock with
current version of Ultrasn0w.
Simply follow the step by step instructions in the video embedded
below to create custom 4.2.1 IPSW file without the upgraded baseband to jailbreak your iOS device.
iPhone developer and hacker ih8sn0w has released Sn0wbreeze 2.2 (aka PwnageTool for Windows) for creating iOS 4.2.1 custom firmware files on Windows. Just like the recently released PwnageTool for Mac, Sn0wbreeze 2.2 also incorporates the kernel based GreenPois0n exploit for untethered 4.2.1 jailbreak.
The highlight feature of Sn0wbreeze 2.2
is the new "Baseband Preservation Mode”. This new mode enables current
iPhone 4, 3GS and 3G users to preserve their baseband while upgrading to
iOS 4.2.1 so that they can unlock using existing version of Ultrasn0w.
The iPhone Dev Team has just released official version of PwnageTool4.2 which incorporates the new kernel based exploit of GreenPois0n for creating full untethered iOS 4.2.1 custom firmware files. Almost all iOS devices are supported except for iPod touch 2G.
List of supported devices by PwnageTool 4.2 includes:
iPhone 3G
iPhone 3GS
iPhone 4
iPhone 4 Verizon
iPod touch 3G
iPod touch 4G
iPad
Apple TV 2G
When to use PwnageTool
over GreenPois0n? If your iPhone relies on a carrier unlock, YOU MUST
use this version of PwnageTool to create custom 4.2.1 firmware files
without the upgraded baseband so that you can unlock your phone on the
old baseband using Ultrasn0w 1.2.
Instructions for jailbreaking using PwnageTool are similar to the last release, simply follow them as posted here. Select iOS 4.2.1 IPSW file where required.
