The iPhone Dev Team’s MuscleNerd has released new redsn0w 0.9.6 beta 2 version called Halloween redsn0w. This new Halloween redsn0w 0.9.6 beta 2 will offer pwned-DFU (limera1n) mode. This new redsn0w will also bring back custom bootlogos for iPhone3GS owners with older bootroms. The tool has been released for both Mac and Windows.
The iPhone owners with Windows operating system looking for unlock can restore their phones with custom IPSW. Unfortunately, the custom IPSW must be made using the PwnageTool 4.1.2 on Mac OS X. Windows users will get “Just enter pwned DFU mode” which is integration of Limera1n by Geohot.
Supported devices:
All these devices running iOS 4.1 can be easily jailbroken. However, if you wish to retain ultrasn0w unlock on your iPhone 4 and iPhone 3GS, then use PwnageTool 4.1.2 to create a custom firmware for retaining the software unlock. Windows users will have to get the custom IPSW firmware made on Mac system and then can restore by simply pressing Shift key and hitting Restore button in iTunes 10.