iPhone Dev Team has released an updated version of PwnageTool 4.0 which was released yesterday. The only reason iPhone Dev Team rolled out this update is to fix issues related to iBooks app which were being experienced by many users after jailbreaking their iPhone by using PwnageTool 4.0. Just like the previous version, PwnageTool 4.01 will jailbreak iPhone 3G, iPhone 3GS and iPod Touch 2G (non-MC model) while preserving your baseband from being upgraded to 05.13.04.
Before you may start jailbreaking your device with the new version, please read the official notes from iPhone Dev Team here to make sure that your device is compatible with the PwnageTool 4.0 or not?
The usage of PwnageTool 4.01 is exactly similar to PwnageTool 4.0. Follow our step-by-step guide here to jailbreak your iPhone 3G, iPhone 3GS and iPod Touch 2G (non-MC models) by using PwnageTool 4.01.