[How To] Jailbreak iPhone iOS 4.2.1 “Untethered” With Redsn0w 0.9.7b1Jailbreak your iPhone 4, iPad, iPod Touch 4G[Mac Only][How To] Jailbreak iOS 4.3 GM With PwnageToolJailbreak your iPhone 4/3GS, iPad, iPod Touch 3G/4G[Mac Only][How To] Jailbreak iOS 4.3 On iPad, iPhone 4, 3GS, iPod Touch With Sn0wbreeze 2.3b1Jailbreak your iPhone 4/3GS, iPad, iPo...

If you have an iPhone 4 and an Apple Developer account, then you can download the iOS 5 b1 firmware. Thanks to the iPhone Dev Team, you can also jailbreak iOS 5 b1 using RedSn0w for the Mac. Just so you know, this procedure will cause you to upgrade your baseband, which will potentially ruin your chances for an unlock. It will not hacktivate so...