How to put your iPhone into DFU mode

DFU mode is the last step on the iPhone,iPod touch, and iPad troubleshooting ladder.

Apple has a solution for you: Putting your iPhone, iPod touch, or iPad into DFU (Device Firmware Update) mode can be your last, best hope for success.

This allows your iPhone, iPad, or iPod touch to be restored from any state. DFU mode requires a bit of timing and can take practice to get right: If at first you don't succeed, don't be afraid to try again.

1. Plug your iPhone X or iPhone 8 into your Mac or PC.
2. Make sure iTunes is running.
3. Turn Off your iPhone X or iPhone 8 (if it isn't already).
4. Press and hold down the On/Off button on the right side of your iPhone for 3 seconds.
5. Press and hold down the volume down button on the left side of your iPhone while still holding down the On/Off button.
6. Keep holding both buttons down for 10 seconds. (If you see the Apple logo, you've held them too long and will need to start again.)
7. Let go of the On/Off Button but keep holding the volume down button for about 5 seconds. (If you see the "Plug into iTunes" screen, then you've held it too long and will need to start again.)
8. If the screen stays black, that's it! Your iPhone should now be in DFU mode.

How to reboot your iPhone 7

1. Press and hold down the On/Off button on the right side.
2. While continuing to hold the On/Off button, press and hold the volume downbutton on the left side of your iPhone.

3. Hold both buttons as the screen turns off, and keep holding them until the screen turns back on and displays the Apple logo.

If all else has failed, you may need to restore your iPhone; if it won't restore normally, you'll need to put it into DFU mode.

1. Turn Off your iPhone 7 if you haven't already done so.
2. Plug in your iPhone 7 to your Mac or PC.
3. Make sure iTunes is running on your Mac.
4. Press and hold down the On/Off button on the right side of your device for 3 seconds.
5. Press and hold down the volume down button on the left side of your iPhone 7 while still holding down the On/Off button.
6. Keep holding both buttons down for 10 seconds. (If you see the Apple logo, you've held them too long and will need to start again.)
7. Let go of the On/Off Button but keep holding the volume down button for about 5 seconds. (If you see the "Plug into iTunes" screen, then you've held it too long and will need to start again.)
8. If the screen stays black, that's it! Your iPhone 7 should now be in DFU mode.