How to fix iPhone 11 shutting down randomly after iOS 13.3 update [Troubleshooting Guide]

Smartphones are constantly evolving throughout the years. They have been innovated and features have improved especially on power management and battery usage. But it is sad to say that even with these new innovations and enhancements, errors and glitches will still show up right after a new update. 

Apple recently released its newest iOS 13.3 update which aims to provide fixes for a few reported errors and brings security enhancement to support iOS devices. However, several iPhone 11 users have experienced a random shut down on their devices after installing the update. That means they’re unable to use their devices to its full potential as it turns off unexpectedly. 

The content of this article is intended for iPhone 11 users who were affected with a random shut down after updating to iOS 13.3. If you’re one of them, feel free to scroll down and learn more information on how to deal with the problem. 

Troubleshoot unexpected power off or random shut down on iPhone 11 after installing iOS 13.3

Power-related problems like a random turning off on iphone 11 can be caused by a defective battery connector. That might be possible if you’ve recently dropped your device or has incurred liquid damage. This could also happen if your phone has been repaired by an unauthorized technician or due to a bad repair. 

If your device has not incurred any physical stress or damage but started to mess up after installing iOS 13.3, then this issue might be caused by a faulty software. Glitches would normally occur right after installing an update and this power issue on your device might be part of it. Read the procedures that are listed and check how you can probably fix the problem.

First solution: Reboot your iPhone 11. 

Fixing an issue on your device through software updates might also result in a newborn problem. Just like how your iPhone 11 randomly shuts down after installing iOS 13.3. But some errors are just temporary or minor and rebooting your device might provide an instant fix to this issue. 

Performing a soft reset might do the trick and worth a try. Here are the steps: 

1. Press and hold the Power/Side button and either of the Volume buttons simultaneously for a few seconds. 
2. Release both buttons once Slide to Power off prompt appears on the screen.
3. Drag the Power off slider to the right to turn off your phone.
4. After 30 seconds, press and hold the Power/Side button again until you see the Apple logo.

For any instance that soft reset is not feasible, your alternative option is a force restart. Here’s how it’s done: 

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.

Both methods will not affect the phone’s internal memory and there’s no need to create backups of your important files. As soon as your phone is up and running, monitor or use it as normal to check if it still shuts off randomly. 

Second solution: Check and install pending app updates on your iPhone 11. 

There are times that rogue apps can cause an unexpected shutdown on your device. They could consume an unprecedented amount of power which affects your iPhone’s performance and causes a power blackout. Updating all apps on your device should help stabilize their performance by providing fixes to reported in-app errors. 

Updating apps will also help in removing conflicts caused by incompatibility problems from the recent software update. This might increase the chance of resolving the shutting down issue on your iPhone 11. Here’s how to update the apps on your device: 

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. 

To implement necessary changes and remove extra cache on the system, restart your device once app updates are installed. Then check if your phone will shutdown or not anymore. 

Third solution: Reset all settings on your iPhone 11. 

Settings on your device plays a vital role on how it can optimize the performance. Incorrect or invalid settings can greatly impact your iPhone’s performance and might have been the reason why it will shut down randomly after installing iOS 13.3. Restoring all settings to its original state will remove those information that has been invalidated by iOS overrides. 

To perform this procedure, you may refer to the steps provided below: 

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

Once all settings reset is completed, your phone will reboot automatically. Allow proper implementation of the original values and options of your phone’s settings then monitor if it shuts down automatically. 

Fourth solution: Restore your iPhone 11 to its default factory configurations. 

If restoring settings to its default values and options did not fix the power issue, then you might need to restore your iPhone to its original factory configurations. This will remove stubborn glitches by deleting all contents on your device and restore the default factory settings. Creating backups via iTunes or iCloud beforehand is necessary so that you can recover your important files and data once the reset is completed. 

If everything is set and backups have been created, here’s how to factory reset your iPhone 11: 

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.

To apply the default factory settings, your device will restart automatically. Set it up like a new one then check if your iPhone is still turning off randomly. 

Fifth solution: Perform a recovery mode restore on your iPhone 11.

Dealing with complex system errors can be made easy by performing a recovery mode restore on your device. This process will allow you to restore iOS, deleting fatal glitches that are unresolvable by simple methods. Doing so might fix your iPhone 11 that is turning off by itself. 

If you wish to proceed, 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 11. 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 11 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. 

Keep your phone connected until the entire restore process is finished. You can only disconnect the device once you’re told to do so. After the process is completed, monitor your iPhone and check if the problem has been rectified. 

Sixth solution: Perform a DFU mode restore on your iPhone 11.

If the error persists up to this point and your iPhone is unexpectedly switching off, then you might need to perform the deepest type of restore to resolve the issue. Device Firmware Update or DFU mode restore is a state where it allows your device to communicate with iTunes even when bootloader is not sync or activated. 

Remember that you can only perform this process given that you did not drop your phone or did not acquire any physical strain. Doing so will result in a brick or permanently damaged iPhone. If you want to take risks, prepare your Mac or Windows computer and follow these steps: 

1. Connect your iPhone 11 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 11 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.

Just perform a force restart to exit DFU mode once the process is done. Then check if your phone is still turning off on its own. 

Still having a random or unexpected shut down on your iPhone 11?

If none of the solutions fixed the problem on your device, it might be time to consult an Apple technician. You can visit the nearest Apple service center in your area and have your device checked for a possible hardware damage that’s causing the power problem after updating to iOS 13.3.