How to Put an unresponsive iPhone into DFU mode
iPhone not booting up? This video shows how to recover your iPhone if it is unresponsive or even getting ready to Jailbreak it, by putting it into DFU Mode. DFU, device firmware upgrade, mode bypasses the current OS and allows you to upgrade or downgrade. Watch this video cell phone repair tutorial and learn how to restore a crashed iPhone by putting it into DFU mode.