This ‘greenpois0n’ is capable of Jailbreaking iPod Touch 2nd gen, iPod Touch 3rd gen, iPod Touch 4rth gen, iPad, iPhone 3gS & iPhone 4 on 4.0, 4.0.1, 4.0.2, 4.1 Firmwares respectively. Download greenpois0n from www.greenpois0n.com If you have an iPhone 3gs then wait for PwnageTool to update so that you can upgrade to 4.1 through a Custom Firmware. Or Alternatively you can also use Snowbreeze If you have an iPhone 4 on 4.0 Firmwares and you are relying on Ultrasn0w to Unlock , then Follow this video to upgrade to 4.1 Firmware safely. This method will preserve your Baseband and you will successfully be able to Upgrade to 4.1 Firmware and then Unlock by installing Ultrasn0w. Here is the Video www.twitvid.com If you have an iPhone 3g then follow this video to Jailbreak for Windows www.youtube.com & Here is the Mac Version www.youtube.com Enjoy the Jailbreak & My Game Center ID is emac2299. Don’t Forget to rate, Comment and Subscribe.