jailbreakmatrix.com How to Jailbreak 4.2.1 on iPhone 4 / 3GS iPod Touch 2G MC / 3G / 4G iPad Tethered Jailbreak Using Redsn0w works in windows and mac Meaning if you reboot you have to connect back to the pc and run redsn0w, or your jailbreak apps wont work. full video guides to jailbreak 4.2.1 and 4.1 here www.jailbreakmatrix.com
