Jailbreak iOS 4.2.1 iPhone 4, 3GS, 3G, iPad, iPod Touch

Apple has just released iOS 4.2.1 GM build to developers and luckily enough, iOS 4.2.1 is vulnerable to Redsn0w 0.9.6 b2 released by iPhone dev team. You can go ahead and�jailbreak your iPhone 3G, iPhone 3GS, iPhone 4, iPod Touch 2G, iPod Touch 3G, iPod Touch 4G and iPad on iOS 4.2.1.
Important:

if you use�Ultrasn0w to [...]

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