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Redsn0w is a popular jailbreaking tool developed by the iPhone Dev Team.
iPhone Dev team had released Redsn0w 0.9.6b4 quite sometime back, which allows iPod Touch users to jailbreak iOS 4.2.1.
In this guide, we will take you through the step by step procedure to jailbreak iPod Touch 4G, iPod Touch 3G and iPod Touch 2G on iOS 4.2.1 using Redsn0w.
Here are some important points to note before you proceed.