Redsn0w 0.9.6 is now available for Windows. You can use it jailbreak iPhone 3G and iPod touch 2G on iOS 4.1. If your iPhone 3G relies on Ultrasn0w unlock, stay away from Redsn0w as it updates your baseband to the latest version, making it impossible (for now) to unlock.
Redsn0w 0.9.6 can also jailbreak iOS 4.2 on iPhone 3G and iPod touch 2G. Proceed at your own risk only. More details can be found here.
This is a beta release of redsn0w for the iPhone3G and iPod Touch 2G at FW 4.1 or 4.0. It uses the same pwnage2 DFU-mode exploit that we’ve been using since the 2.x days. It does not include the SHAtter exploit developed by pod2g. Nothing new is revealed to Apple with this jailbreak.
if you have an “MC” model of the ipt2g, your jailbreak will be tethered…sorry! (Consider rolling back to a FW supported by jailbreakme.com or spiritjb.com)
The instructions are exactly similar to the ones posted earlier for Mac OS X users earlier. Simply download Redsn0w 0.9.6 for Windows from the link given below and then follow the complete step by step instructions posted here to jailbreak iPhone 3G and iPod touch 2G on iOS 4.1.
iPhone 4, iPad, iPod touch 4G and Apple TV 2G users on iOS 4.1 must wait for GreenPois0n which is due to be released on Sunday, October 10th 2010.