iPhone Keeps Restarting? Here’s Every Fix You Need To Know

“My iPhone keeps restarting whenever I turn it on. How to fix this and boot it normally instead?”

As a friend of mine asked me this recently, I realized that a lot of other people also undergo a similar situation. While Apple has certainly made iPhones reliable, there are times when they malfunction out of the blue. For instance, getting iPhone stuck in the restarting loop is a severe issue that should not be overlooked. Since all kinds of problems can cause an iPhone to reboot randomly, we need to try a handful of solutions. I did some research and finally came up with every possible fix for iPhone keeps restarting problem right here.

• Part 1: The Possible Reasons why our iPhone Keeps Restarting
• Part 2: Troubleshoot App-related Causes
• Part 3: Insert a new SIM Card and Establish a Strong Network Connection
• Part 4: Check iPhone's Port, Cable, and Battery
• Part 5: Force-quit and Delete Malfunctioning Apps
• Part 6: Use iTunes to Restore a Previous Backup
• Part 7: A Useful Tool to Restore Data – dr.fone – Recover (iOS)
• Part 8: Boot your iPhone in Recovery mode or DFU mode
• Part 9: Use dr.fone - Repair (iOS) to fix your frozen iPhone flexibly
• Part 10: Clear Your iPhone's Cache

Part 1: The Possible Reasons why our iPhone Keeps Restarting

Before we discuss all kinds of solutions for iPhone X/8/7/6/5 keeps restarting, let’s understand what could have caused this problem.

• The iPhone storage could have been corrupted
• An incomplete or corrupt update of its firmware
• The update of the device to a beta iOS release
• A jailbreaking operation went wrong
• Any corrupt or malfunctioning app could have caused this
• The bootloader of the device has been tampered with
• The iOS device has been physically damaged
• If the phone has been infected by a malware or virus
• Any other issue related to its firmware or booting

Part 2: Troubleshoot App-related Causes

Mostly, the iPhone keeps rebooting issue is related to faulty, old, or corrupt apps. To fix this, you can choose to update your apps or delete any unreliable app from your phone.

2.1 Update All Apps

If you are running old and unsupported apps on your iPhone, then they might cause iPhone to reboot itself multiple times. Here’s how you can update all apps in one go.

Step 1. Launch App Store on your device and go to the “Updates” section from its bottom panel.

Step 2. A list of all the apps available for an update would be displayed. Just tap on the “Update” button adjacent to the app icon to upgrade it.

Step 3. To update all the pending apps in one go, tap on the “Update All” button at the top. Maintain a stable internet connection to fasten the process.

2.2 Delete Suspicious Apps

Chances are that some apps on your phone can be from unreliable developers. The best way to resolve this is by getting rid of the apps you don’t trust.

Step 1. Unlock your device, go to its home, and hold any app icon. This will make the apps go wiggle.

Step 2. Just tap on the delete (the cross) symbol at the top of the icon and confirm your choice to uninstall the app.

Step 3. If your device is not functioning, then you can take the assistance of iTunes to uninstall apps as well. Connect your iPhone to iTunes and go to its Apps section.

Step 4. A list of all the installed apps on your device would be displayed. Just click on the “Remove” button adjacent to the app to delete it from your phone as well.

Part 3: Insert a new SIM Card and Establish a Strong Network Connection

Sometimes, the iPhone reboots itself due to a faulty SIM or if it is not able to locate the SIM card at all. To fix this issue, you can insert another SIM card and make sure it has a strong network connection.

Step 1. Using the ejector tool, take out the existing SIM from your phone and clear the SIM tray with a dry cloth.

Step 2. Place the new SIM card on the tray and insert it into the SIM slot.

Step 3. Wait for a while for the device to detect the SIM. You can view the connectivity status from the network bar. Move to an open area where you have a good network connection to fix it.

Part 4: Check iPhone's Port, Cable, and Battery

A lot of people don’t realize that a physical damage can also result in iPhone X keeps rebooting. Mostly, a faulty port or battery can be a reason for this. Firstly, check the charging port of your device and make sure it is not clogged. You can clean it with a dry piece of cloth without damaging it.

Also, the battery on your device should be charged enough. If not, use an authentic and working cable to charge your device. Consider charging it with another cable or socket it if won’t work the first time.

Part 5: Force-quit and Delete Malfunctioning Apps

Sometimes, all it takes is one faulty app to make your iPhone stuck in the reboot loop. Thankfully, the iPhone 7/8/X keeps restarting issue due to this can easily be fixed by force-quitting the app and deleting it.

Step 1. If your iPhone has a Home button, then just double click it to get the app switcher. Now, swipe up the app that you wish to forcefully quit.

Step 2. For iOS devices without the Home button, users need to touch the gesture area, located at the bottom of the screen.

Step 3. Swipe up while still touching the screen to get the app switcher window. Just swipe up the card of the app to close it.

Step 4. Go to the Home screen and hold the app icon for a while to make them start wiggling. Tap on the delete/cross button of the faulty app icon and confirm your choice to remove it.

Part 6: Use iTunes to Restore a Previous Backup

If you are a regular iPhone user, then you must be aware of iTunes as well, as it lets us manage our device for free. Apart from taking a backup of our iPhone data, it can also be used to restore it. Though, before we discuss this iPhone 5/6/7/8 keeps restarting troubleshoot, you should have a prior backup of your device on iTunes. Also, you should restore it to the same device to avoid any compatibility issues.

Step 1. Using a working cable, connect your iPhone to the system and launch an updated iTunes application on it.

Step 2. Select your iPhone and go to its “Summary” tab to continue. If you wish to reset the device to factory settings, then just click on the “Restore iPhone” button and confirm your choice.

Step 3. In order to restore an existing backup, click on the “Restore Backup” button under the Backups section.

Step 4. A pop-up window will launch, letting you select the backup version that you can restore to your device.

Please note： that this will erase the existing data on your device and would replace it with the backup content.

Part 7: A Useful Tool to Restore Data – dr.fone – Recover (iOS)

A lot of users don’t consider using iTunes as it can be a bit complicated and yield numerous compatibility issues. In this case, you can try dr.fone – Recover (iOS), which is one of the most reliable data recovery tools for iOS devices. Even if you have not taken a prior backup of data on iTunes/iCloud, the application can help you retrieve your lost files. It can also be used to restore content from an existing iTunes or iCloud backup without causing any data loss.

• The tool can scan your device and retrieve all sorts of lost or deleted content from it.
• You can also load an existing iTunes/iCloud backup and restore its data to your phone without compatibility issues or data loss.
• It will let you preview the backup content or the retrieved data, letting you select the files you wish to save.
• Supports all kinds of major data types such as photos, videos, audios, notes, bookmarks, contacts, messages, call logs, and so on
• No prior technical knowledge is needed as it features an intuitive interface. It is compatible with all the leading iOS models (no jailbreak needed).

Part 8: Boot your iPhone in Recovery mode or DFU mode

If none of the above-listed methods would seem to work, then you can also boot your iPhone in either Recovery or the DFU mode. Both of them works similarly and would let you reset your device, fixing the iPhone keeps restarting issue. The only difference is that DFU mode would skip iBoot, which is the device’s bootloading unit. Though, you should know that this will reset your device to factory settings, erasing all the existing data from it. That is why it is often considered as a last resort by users.

In order to boot your phone in the DFU or Recovery mode, you can take the assistance of iTunes. There are different key combinations that you need to apply that would vary among iPhone models.

Boot iPhone in Recovery Mode

Launch an updated iTunes version on your system and follow these key combinations while connecting your device to the system.

iPhone 6s and older models

Turn off your phone if it isn’t already and wait for a while. Hold and press the Home button while connecting it to the computer. Let go when the recovery mode symbol would appear.

iPhone 7/7 Plus

Power off your iPhone and wait for a few seconds. Now, press the Volume Down key while connecting it to the system. Keep pressing it and let go once the iTunes symbol will come.

iPhone 8 and newer models

Power off your device and connect it to the system while holding the Side key. Keep pressing the Side key until you see the recovery mode symbol on the screen.

Boot iPhone in DFU Mode

The Device Firmware Update is a more powerful mode that has a different key combination. Make sure that your phone’s screen stays black till the end. If it shows the Apple logo or iTunes symbol, then it means you have made a mistake and would have to restart the drill.

iPhone 6s and older models

Power off your iPhone and connect it to iTunes at first. Press and hold the Home + Power buttons at the same time for around 10 seconds. Later, release the Power key, but hold the Home key for another 5 seconds.

iPhone 7/7 Plus

Turn off the device and use a working cable to connect it to your system. Launch iTunes and press the Power + Volume Down buttons at the same time. Hold them for 10 seconds and let go of the Power key. Hold the Volume Down button alone for another 5 seconds.

iPhone 8 and later models

Switch off your iPhone and connect it to iTunes using a working lighting cable. Press the Side and the Volume Down buttons at the same time for 10 seconds. Afterward, release the Side key, but keep holding the Volume Down button for 5 seconds.

In no time, iTunes will detect that there is an issue with your iOS device as it would boot in the DFU or Recovery mode. As a prompt like this would appear, choose to restore the device to fix the iPhone 6/7/8/X keeps restarting issue. This will make your phone restart in the normal mode with its default settings and no existing data.

Part 9: Use dr.fone - Repair (iOS) to fix your frozen iPhone flexibly

Whenever my iPhone keeps restarting, this is the tool that I use and it works every time. Developed by Wondershare, it can fix all kinds of major and minor issues with every leading iOS device. The tool features two modes, standard and advanced. The standard mode can fix every major issue with the device without causing any data loss on it. The application is known to fix issues like iPhone randomly restarts, iPhone keeps restarting, the screen of death, and numerous other scenarios.

Step 1. Launch the dr.fone toolkit and from its welcome screen, visit the “Repair” module. Also, using a lightning cable, connect your iPhone to the system.

Step 2. Under the iOS Repair option, you can view the standard and the advanced mode features. If you don’t want to lose your device’s data, pick the standard mode.

Step 3. The application will automatically detect your device and would display its model and compatible firmware version. Just verify this and click on the “Start” button.

Step 4. Wait for a while as the tool would download the related firmware update for your phone. Subsequently, it will also verify it with your device model to eliminate compatibility issues.

Step 5. Once the download is completed, you will be notified. You can now click on the “Fix Now” button and wait as the application will resolve the error with your device.

Step 6. After a while, your phone would be restarted in the normal mode and the process will be completed.

That’s it! This will fix iPhone reboots itself issue without any data loss. In case if the problem sustains, then choose the “Advanced Mode” of the tool instead. While it will erase the existing data on your device, it would also deliver better results.

Part 10: Clear Your iPhone's Cache

Last, but most importantly, your iPhone might have a lot of cache data, causing it not to restart normally. While cache data helps the overall user experience, its accumulation can also affect your device’s working. Here are different techniques to clear your device cache and fix iPhone X keep restarting issue.

Step 1. To wipe off Safari data, go to Settings > Safari and tap on “Clear History and Website Data”. Confirm your choice as a warning message would appear to remove Safari’s cache data.

Step 2. Similarly, you can go to any other browser like Google Chrome and visit its privacy settings. From here, you can choose to clear all data (including website history, cache, temp files, and so on).

Step 3. Additionally, you can choose to offload the data of the apps you no longer use. Just visit the App Store settings on your phone and enable the feature to “Offload Unused Apps”.

Apart from that, there are several other ways to delete iPhone’s cache and other unwanted content as well.

I’m sure that after going through all these suggestions, you would be able to fix issues like iPhone randomly restarts or iPhone keeps restarting. One of the best ways to fix the iPhone stuck in reboot loop is by using a reliable tool like dr.fone - Repair (iOS). It can resolve all kinds of minor and major issues of an iOS device without causing any data loss. Feel free to give it a try and let us know if your iPhone 6/7/8/X still keeps restarting or not.