This tutorial will take you step by step through the process of downloading and what to select to achieve this goal that you would like.
You will have to download firmware and then attach your phone to your computer.
Step Two Right click or control click the Red Sn0w application that you extracted in Step One and click Run as Administrator from the popup menu that appears. Step Seven You will be asked if you would like to Prevent baseband update. Step Eight You will be told that Pwned DFU mode is required. Step Nine Connect your i Phone to the computer, turn it off, and click Next Step Ten Red Sn0w will now guide you through the steps to get into DFU mode. Hold down both the Home button and the Power button for 10 seconds.
Release the Power button and continue holding the Home button until Red Sn0w detects the device.
An i Phone in recovery mode is almost entirely useless to someone.
At that point, it’s effectively become an expensive brick!