How to fix an iPhone that keeps restarting by itself after iOS 13 update

Auto-restart or an iPhone that keeps restarting by itself might be integrated to a hardware damage specifically on the battery compartment or the battery connector. These factors might coincidentally happen after installing a new software update. Also, post-update bugs and glitches may add some triggers causing the issue to occur. 

The solutions that you can find in this article will specifically address software-related causes and help you fix the problem. If you have an iPhone that keeps restarting by itself after iOS 13 update, then the information that you’ll find as you read further might help you resolve the inconvenience and use your phone without an issue. 

Before we move on to our troubleshooting, if you happen to find this post while looking for a solution to a different problem, then visit our iPhone Help Guides page for we have already addressed some of the most common issues with this device. We may have already published articles that could help you fix your problem. Find issues that are similar to yours and feel free to use our solutions.

First solution: Force restart your iPhone. 

Software bugs inflicted by the recent update could deter your phone’s performance to do well. Also, these glitches could affect the phone’s system as a whole and might cause unusual concerns to arise such as an iPhone that keeps restarting by itself. Performing a force restart has been one of the oldest and most used solutions that handles minor glitches on your phone’s system. Doing so will likely refresh the system and improve its performance by eliminating erratic cache and force close rogue apps. This might be the answer to your problem. If you have not performed this process yet, here’s how: 

  1. Press and release the Volume Up button quickly.
  2. Press and release the Volume Down button quickly. 
  3. Lastly, press and hold the Side button for a few seconds until you see the Apple logo.

If this procedure successfully eliminates the issue, install all pending app updates on your iPhone to remove incompatibility issues that could trigger such symptoms to occur. Simply refer to these steps: 

  1. From the Home screen, tap on App Store to open it. 
  2. Tap on Today tab at the bottom. 
  3. Then tap on the user profile icon on the top right corner of the screen. 
  4. You should see the account details. 
  5. Scroll down to the Available Updates section. 
  6. Tap on Update next to the app to update individual apps.
  7. Tap on Update All to update all apps simultaneously. 

Just reboot your iPhone again once apps are updated to implement necessary changes and clear dump cache. 

ALSO READ: What to do if your iPhone is stuck on “Verifying Update” after iOS 13

Second solution: Factory reset your iPhone that keeps restarting. 

If issue is unresolved by the first procedure, you may need to restore your iPhone to its default factory settings. Severe errors might have been affecting your phone’s system and causing disturbances to its operation. Normal procedures might not be able to fix this case. Executing a factory reset will delete all files and content on your device including stubborn bugs that contributes to the occurrence of the issue. Follow these steps to carry out a factory reset on your iPhone: 

  1. Access Settings from the Home screen. 
  2. Tap General.
  3. Scroll down to and then select Reset
  4. Tap the Erase all contents and settings option.
  5. Enter your device passcode once prompted.
  6. Then tap to confirm all settings reset.

You might your phone restarting by itself after factory reset is done. Don’t worry as it is normal operation to restore default factory configurations on your phone. Just allow your device to reboot completely and as soon as it boots up, follow the initial set up process just like when you got your phone for the first time to use it again. 

Third solution: Restore your iPhone via iTunes. 

If the issue is persistent and could not be resolved by the previous procedures, there might be a more complex error that’s immanent in the system causing your iPhone to keep restarting by itself. Performing a recovery mode restore via iTunes will allow you to restore previous backup that has been created prior updating to iOS 13. Doing so will remove the bugs on the current software version and might resolve the problem. 

In order to carry out this process, you’ll need to prepare a Mac or Windows computer with the latest iTunes installed. Also ensure that your computer runs on the latest operating system that is compatible with your iPhone Max. If all requirements are met, connect your device to the computer using the Apple-supplied USB/lightning cable. Then allow iTunes to sync with your iPhone and backup files, if possible. Once the backup is secured, follow these steps to put your iPhone Max in recovery mode and then restore iOS in iTunes:

  1. Press and release the Volume Up button quickly.
  2. Press and release the Volume Down button quickly.
  3. Then press and hold the Power/Side button once prompted with Connect to iTunes screen. Do not release the button when Apple logo appears as you will need to enter recovery mode state.
  4. Once you enter the recovery mode, you’ll see either Update or Restore option.
  5. Select Restore if you want to reinstall and download iOS on your device without erasing data. 

Do not disconnect your phone and keep it connected until the entire restore process is finished.

ALSO READ: What to do if your iPhone is stuck on “Verifying Update” after iOS 13

Fourth solution: Perform DFU mode restore on your iPhone. 

If the issue still occurs up to this point, you’ll need to opt-in for an advanced solution that could help in fixing the problem. The most in-depth type of restore that you can do to your iPhone is a Device Firmware Update (DFU) mode restore. This is a state where it allows your device to communicate with iTunes even when bootloader is not sync or activated. Performing this procedure will remove bugs that’s lurking down to the core of your phone’s system. But before you execute the steps below, make sure that your phone has not incurred any physical stress like accidental dropping or liquid as that could permanently destroy your iPhone. If so, follow these steps: 

  1. Connect your iPhone to the computer using the supplied USB/Lightning cable. Once connected, open iTunes on your computer. 
  2. Press and quickly release the Volume up button.
  3. Press and quickly release the Volume down button.
  4. Press and hold the Side/Power button until the screen goes black.
  5. After the screen turns black, press and hold the Volume down button while keep holding down the Power/Side button
  6. Wait for 5 seconds then release the Power/Side button but keep holding the Volume down button until your iPhone shows up in iTunes. 
  7. Release the Volume down button once you see your iPhone in iTunes then follow the rest of the on-screen instructions to start restoring your iPhone through iTunes.

If this procedure has been successful, just restart your iPhone to exit DFU mode and go back to the normal mode. 

ALSO READ: Apple iPhone got stuck on Resume Download during iOS 13 update

The solutions listed above should be enough in handling software-related issue on your phone. If your iPhone keeps on restarting by itself after executing the steps, you might need to visit the nearest service center in your area and have your phone checked by their onsite technician. It might need a repair as this issue might be hardware-inflicted already. If you live far from the service center, contacting Apple support might be an option as they can provide you with official recommendations on how to fix your iPhone that keeps restarting by itself after iOS 13 update. 

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