Ultimate Guide to Jailbreaking iOS 4.2.1 with Greenpois0n RC5 B4 🚀

GreenPois0n RC5 for Windows and mac -- http://greenp0ison-jailbreak.blogspot.com/<br />Notes:<br />- NOW WILL JAILBREAK VERIZON IPHONE!<br />- works with ALL devices, except iPhone 3G. use redsn0w for that.<br />- if you have an unlocked iphone 4, DO NOT UPDATE YET.<br />- will this delete my music and apps? - no.<br />- if you hav any issues when jailbreaking hold the home and power buttons on your device until it reboots.<br />- if your anti-virus detects that greenpois0n is a virus turn it off and then do this jailbreak. its safe, i promise