DFU is the abbreviation of Device Firmware Upgrade mode which allows the restoration of a device from current state. In this mode, the boot-ROM may accept iBSS. Moreover, DFU is burnt into the hardware as a part of secure-ROM, so removing it is not possible. Although DFU mode resembles the most obvious recovery mode but they aren’t the same, because in recovery mode the device is reverted to factory settings with the latest iOS available whereas in DFU mode, iTunes can still communicate with the device but cannot upgrade its software to the latest version automatically.

Now, here’s how you can put your device in DFU mode-

Preliminary knowledge

  • Below the display of your iPhone, the circular button is the Home Button .
  • The power button is known as Sleep / Wake Button.
  • Firmware is the bridge between hardware and software which means that it controls the functionality of a given device.
  • During a DFU restore, your pc or mac completely erases all the coding present on the device that controls it and if even a small issue arises, then it can potentially harm the device.
  • Water damaged iPhone shouldn’t be used for this, as it sometimes wrecks it functionality completely, if the restore doesn’t complete.
  • Your device can be on or off before its put in DFU Mode.

 How To Put Your Apple Device To DFU Mode

  A-9 devices and older (old iPad, iPhone SE, iPod touch 6, iPhone 6S and below)

  1. Connect your device to a pc or mac using USB.
  2. Hold the Home button with sleep / wake button.
  3. After about 8 seconds, release the sleep / wake button but keep holding down the Home button.
    • If the logo of Apple starts to appear, the sleep / wake button was held longer than needed.
  4. A blank screen would indicate that the device has entered DFU mode.
  5. Restore your device with the help of iTunes.

If the device prompts you to connect your device to iTunes, then repeat these steps.

  A-10 devices (iPad 2018, iPhone 7 and 7 Plus, iPod touch 7)

  1. Connect your device to a pc or mac using USB.
  2. Hold the sleep / wake button with Volume Down button.
  3. After about 8 seconds, release the sleep / wake button but keep holding Volume Down button..
    • If the logo of Apple starts to appear, the sleep / wake button was held longer than needed.
  1. A blank screen would indicate that the device has entered DFU mode.
  2. Restore your device with the help of iTunes.

If the device prompts you to connect your device to iTunes, then repeat these steps.

  A-11 devices and further (iPad Pro 2018, Air 2019, Mini 2019 and iPhone 8, 8 Plus, XS,XS max, XR)

  1. Connect your device to a pc or mac using USB.
  1. Quick-press Volume Up and then Volume Down button
  2. Hold the sleep / wake button until the screen turns black, then hold the sleep / wake button with Volume Down button.
  3. After about 5 seconds, let go of the sleep / wake button but keep holding Volume Down button.
    • If the logo of Apple starts to appear, the sleep / wake button was held longer than needed.
  1. A blank screen would indicate that the device has entered DFU mode.
  2. Restore your device with the help of iTunes.

  If the device prompts you to connect your device to iTunes, then repeat these steps.

 How To Check If The Device Is In DFU Mode

  • If device display shows Apple’s logo, the steps weren’t executed correctly and the device is rebooted. The steps need to be repeated all over again.
  • If the iPhone shows the logo of iTunes, the steps weren’t executed correctly and the device has entered recovery mode. The device needs to be restarted to exit recovery mode.
  • If iTunes does not prompt of a detected iPhone in recovery mode, it means that the device isn’t in DFU mode.
  • If the device display isn’t black, shows that the device hasn’t entered DFU mode.

How To Exit DFU Mode

Your device will exit DFU mode automatically once it has been restored successfully. But in case, the user enters DFU mode by mistake and needs to return to normal functionality by exiting DFU mode, then just hold the Volume button with Sleep / Wake button till Apple’s logo starts to appear.

 

 

DFU mode is simply the perfect way to install previous versions of iOS, update firmware or just to fix an unresponsive device. It can also be used to verify the hardware, and the functionality of the right software, due to which DFU mode is extremely essential for jailbreaking your iPhone.

Although I hope I’ve addressed all your queries but if you need any further assistance, you can leave a comment below. You can also visit support.apple.com.