How To: Put iPod Touch or iPhone into DFU mode

How to Put iPod Touch or iPhone into DFU mode

If you are planning on jailbreaking your iPod or need an emergency restore, you will need to put your iPhone into DFU mode. DFU mode is only used in these dire circumstances, however, and can harm your device. If you need to use DFU mode for any reason, check out this tutorial first and make sure you have mastered the step by step.