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iPhone Dev team has released Redsn0w 0.9.12b1 that includes support for untethered iOS 5.1.1 for iPhone, iPad and iPod touch. It includes Rocky Racoon and untethered iOS 5.1.1 jailbreak developed by pod2g and planetbeing that was used in Absinthe 2.0.x jailbreak.
In this article, we will take you through the step-by-step procedure to jailbreak your iPhone on iOS 5.1.1 using Redsn0w for both Mac and Windows users.
Here are some important points to note before you proceed.