How to Jailbreak iPhone 4, iPhone 3GS with iOS Version 4.0 Using JailbreakMe.com. Warning: Jailbreak at your own risk. Please exercise caution and read the
How to Jailbreak Verizon iPhone 4 with iOS Version 4.2.5 Using Greenpois0n Warning: Jailbreak at your own risk. Please exercise caution and read the comments,