5 iPhone issues that can be fixed with DFU mode

iPhone is not 'immune' to all problems. In fact, most users experience at least a few problems with the iPhone during its lifetime. One of the most powerful tools to fix these problems is iOS's Device Firmware Update (DFU) mode.

DFU mode is a special iPhone state that you can use to reinstall all software and firmware lines on your device. It has the deepest possible recovery for iPhone and is even more effective than putting the device in Recovery mode.

Here are some iPhone issues you can fix with DFU mode.

5 iPhone issues that can be fixed with DFU mode

1. Device is not responding

You might think your iPhone has been turned into a 'brick', when it encountered firmware issues. Among other things, the firmware is responsible for telling the iPhone how to respond to the various buttons on the device.

For example, when you press the Sleep / Wake button , the firmware will start to boot iOS. If the iPhone does not turn on, then it is probably because the firmware is not responding properly with that button.

2. The boot loop leads to a failed boot

The boot loop is the term when the iPhone cannot pass the Apple logo during boot. This happens if there is a problem with the operating software on the device.

It's difficult to try other troubleshooting suggestions, if you can't get past the boot screen, but you can still put your iPhone in DFU mode. This allows you to reinstall the software, overriding any errors that cause the boot loop.

3. Firmware is corrupt, broken

A lot of people already know how to use Recovery mode on an iPhone to fix a corrupted software, but corrupt firmware is quite another problem. If a message appears saying the firmware on your iPhone is corrupt, the only option now is to fix it using DFU mode.

A firmware crash may affect all components of the iPhone. They can lead to everything from slow performance to poor WiFi connections. When you reinstall the firmware via DFU mode, it will fix all sorts of problems like this.

4. Software update failed

There's a reason why iPhones don't start updating software when their batteries are low. If you lose the right to update halfway through, the operating software will end in a 'limbo' situation. That usually means the iPhone won't be able to complete the update nor can it use the previous software.

When you use DFU mode to recover your device, it will overwrite incomplete software with new code, updating your iPhone to the latest version of iOS in the process.

5. Hardware related issues

Firmware on iPhone tells the device how to work with different hardware components. As a result, the problems that seem to require physical repair are actually the result of faulty firmware.

Some of these issues include:

1. Battery life is erratic
2. Button not responding
3. A blank screen is displayed in either white or black
4. The reaction on the touch screen is unpredictable

Note before putting iPhone in DFU mode

If you encounter any major issues with your iPhone, then most likely you can fix them with DFU mode. When you restore your iPhone with this mode, it will reinstall the software and firmware, as well as delete all content. The iPhone will function as well as the new one after it is completed.

That means there are some risks associated with DFU mode.

Create iPhone backups first

When you restore iPhone using DFU mode, all content on iPhone will be deleted. First, you need to make sure you have a recent backup so you don't lose any photos, videos, messages, apps, or other personal data.

You cannot backup iPhone after putting it in DFU mode. See Quantrimang.com 's iPhone backup guide for more details on how to do it.

Do not use DFU mode on broken iPhones!

If the iPhone is physically damaged, restoring it to DFU mode may render the device completely unusable. It doesn't matter if you drop your iPhone into the water, crack the screen or damage the headphone port, if your device is broken, I don't recommend using DFU mode.

The reason for this is because DFU mode requires the iPhone to reconnect to different hardware components. If that cannot be done due to damage, then it cannot end the firmware recovery and the iPhone will be unusable.

How to put iPhone in DFU mode

The process of putting iPhone in DFU mode depends on the iPhone model you have. You'll know you're right if the computer recognizes the device but nothing shows up on the iPhone screen.

To get started, use an Apple-certified USB cable to connect your iPhone to the computer. When you finish the last step, if the iPhone screen is blank, it is already in DFU mode. You can follow the prompts on your computer to recover your device.

However, if you see the computer icon or iTunes on the iPhone screen, that means you have put it in Recovery mode. Reconnect your phone to the computer and repeat the instructions from step 1 again. Failure on the first try is common.

For details, please refer to the article: How to put iPhone / iPad in DFU mode to restore.

After restoring your iPhone using DFU mode, you will no longer have any software or firmware issues. If this doesn't work, restore the device but don't restore any data from the backup. If you do this and are still having problems, your iPhone needs physical repair.

Visit genuine service centers to find out which parts need replacing. If your iPhone is still under warranty, you can get it repaired for free. If not, Quantrimang.com has a lot of articles showing you how to fix iPhone yourself:

1. IPhone camera is not working: common problems and how to fix it
2. Troubleshoot Wi-Fi connection issues in iPad and iPhone
3. 4 ways to fix iPhone's home button yourself

Wishing you soon overcome all problems successfully!