jailbreak 4.2.1 iphone 4 windows
GreenPois0n rc4 is a multi-platform (meaning it works on Windows, Mac and PC) Jailbreak for iPhone, iPod Touch, and iPad. It uses the Shatter exploit, and is a very simple and easy to use GUI Jailbreak.

Stuff it works for:
iPhone 3GS ( new bootrom Untethered )
iPhone 3G - Untethered
iPod Touch 4G - Untethered
iPod Touch 3G - Untethered
iPod Touch 2G ( new bootrom Untethered )
iPad WiFi + 3G - both Untethered

DOWNLOAD:
--SERVER 1--
windows: http://bit.ly/gKiLmn
mac: http://bit.ly/dLowjS

--SERVER 2--
windows: http://bit.ly/hJMUnf
mac: http://bit.ly/dRoNah

Extra Tags

jailbreak
jailbreak ps3
jailbreak 4.2.1
jailbreak iPhone
jailbreak iPad
jailbreak iPod Touch