How Do I Put my Device into DFU mode?

How To Put Your iPhone Into DFU Mode – Before we learn you how to put your device in DFU mode, you have to know first what is the meaning of “DFU mode”its Device Firmware Upgrade mode which allows you to restore iOS even if something has gone wrong on the software level of the device.

Also DFU mode is used to get a the device ready for applying the jailbreak or to restore custom firmwares

How Do I Put my Device into DFU mode?

Step 1: Open iTunes and connect the iPhone to your PC or Mac, make sure that you are using the latest iTunes version on your computer

Step 2: You have to be patient in this step cause this is the most important step

• Hold the power button and home button for 15 seconds the both with each other.
• Then release the power button but keep holding the home button for another 15 seconds.

The screen below will appear if your steps are right 

Step 3: If you’ve successfully entered DFU mode, the device screen will be black and iTunes will say it’s in recovery.