If you are an iPhone user or someone who troubleshooted iOS devices, you’ve probably encountered the term DFU mode at some point. But what exactly is DFU mode, and why is it essential to know about it?

Wondering what is DFU mode? This article discusses DFU mode, its purpose and the steps to enter DFU mode on various iOS devices.

What is DFU mode?

DFU, which stands for Device Firmware Update, is a special mode on iOS devices that allows you to interface with the firmware and operating system at a very low level. This is different from recovery mode, often used for restoring your device to factory settings or installing a new version of iOS. DFU mode, on the other hand, lets you perform more advanced operations like downgrading your iOS version, jailbreaking, and fixing critical issues that can’t be resolved through regular means.

Also read: What does TFW mean on iPhone?

When should you use DFU mode?

Here are some common scenarios where it can be incredibly helpful:

Software Troubleshooting: When your iPhone is stuck in a boot loop, unresponsive, or experiencing severe software issues, DFU mode can help you restore it to a working state.
Downgrading iOS: If you’ve updated to a new iOS version and want to revert to the previous one, DFU mode allows you to install an older firmware version.
Custom Firmware: Advanced users may utilise DFU mode to load custom firmware onto their devices, which can offer more control and flexibility.
Unlocking: In some cases, DFU mode can be used to unlock a locked iPhone, although this should be approached with caution and is not recommended for most users.

How do I enter DFU mode?

Here are the steps to enter DFU mode on various iOS devices:

For iPad, iPhone 6s and earlier, iPhone SE, and iPod touch

Connect your device to a desktop using a USB cable.
Press and hold both the Home button and the Lock button (the one on the top or side) together.
After 8 seconds, release the Lock button while still holding the Home button.
If you see the Apple logo, the Lock button was held for too long. In DFU mode, the screen remains blank. iTunes will alert you if it detects a device in recovery mode.
If your device shows a message to connect to iTunes, repeat these steps.

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For iPhone 7 and iPhone 7 Plus

Connect your device to a desktop using a USB cable.
Press and hold both the Side button and the Volume Down button.
After 8 seconds, release the Side button while continuing to hold the Volume Down button.
If you see the Apple logo, the Side button was held down for too long. In DFU mode, the screen stays blank. iTunes will notify you if it detects a device in recovery mode.
If your device displays a message instructing you to connect to iTunes, try these steps again.

For iPhone 8, iPhone 8 Plus, and iPhone X

Connect your device to a desktop using a USB cable.
Quickly press the Volume Up button.
Quickly press the Volume Down button.
Hold down the Side button until your device’s screen goes black, then press and hold the Side and Volume Down buttons together.
After 5 seconds, release the Side button and keep holding the Volume Down button.
If you see the Apple logo, the Side button was held down for too long. In DFU mode, the screen remains blank. iTunes will alert you if it detects a device in recovery mode.
If your device prompts you to connect to iTunes, attempt these steps again.