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coderetard.com — While iPhone v2.1 firmware was released yesterday and iPhone Dev Team's Pwnage 2.1 tool was released shortly after, Windows users were left in the dark without a way to upgrade and jailbreak to 2.1... until this guide came along! These steps use QuickPwn 1.2.0 for Windows to upgrade and jailbreak your iPhone to the latest v2.1 firmware available.