Fix Samsung Galaxy Z Flip 4 Keeps Rebooting After An Update

Are you experiencing the Samsung Galaxy Z Flip 4 restarting issue? There are several factors that can cause this problem such as a corrupted update, third party apps, or even a hardware issue. To fix this you will need to perform several troubleshooting steps.

The Samsung Galaxy Z Flip 4 is one of the latest premium Android smartphones to hit the market that sports a folding form factor. It can be used just like any other smartphone and when not in use you can simply flip it making it more compact and allowing it to fit in your pocket. Some of the best features of this model include its use of a 6.7 inch Foldable Dynamic AMOLED display, Snapdragon 8 Plus Gen 1 chip and a battery capacity of 3700 mAh.

Why is my Samsung Galaxy Z Flip 4 phone continuously restarting?

Why is my phone restarting again and again?

One of the issues that you might encounter with your Samsung Galaxy Z Flip 4 is when it keeps on restarting after software updates have been installed. This can be an annoying experience as you won’t be able to properly use your phone when this kind of problem occurs.

Here’s what you need to do to fix this Z Flip 4 restarting problem.

Solution 1: Check if the Z Flip 4 battery is drained

The first thing you need to do in this case is to check the battery percentage left in your phone. If your device is experiencing battery drain issues then it’s possible that this is what’s causing it to constantly restart.

To fix this you should try to charge your phone.

Charging the device

  • Plug the power adapter to a working electrical outlet.
  • Use a working USB-C charging cable to connect your Galaxy Z Flip 3 to the charger.
  • Leave the phone connected to the charger.

Try using your phone normally with it still connected to its charger. Does it still reboot? If it doesn’t then continue charging the phone until it reaches the charge level 100%.

Disconnect the phone from the charger once the battery level is full then try using it normally. If the issue does not occur then it might just be caused by a drained battery.

Solution 2: Start the Z Flip 4 in Safe Mode

One of the factors that can cause Samsung phones to keep on restarting are installed third party apps. A third party app installed in your phone might be the culprit and in order to check this you will need to start your device in Safe Mode.

When your phone starts in this mode only the pre-installed apps will be allowed to run. Any app you downloaded will be prevented from starting or running . This makes it easier to check if the issue is caused by a downloaded app.

Safe Mode

  • Press and hold the Power button and Volume down button (right edge) until the ‘Power off’ prompt appears on the screen then release.
  • Touch and hold Power off until the ‘Safe mode’ prompt appears then release.
  • To confirm, tap Safe mode.

Wait for up to 30 seconds for the process to complete. When your device reboots “Safe Mode” will appear on the lower left side of the home screen.

Try observing if the phone reboots in this mode.

In case the issue does not occur then you will need to find out the specific app that is causing this problem and uninstall it.

After uninstalling the app you can exit from safe mode.

Exit Safe Mode

  • Press and hold the Side key.
  • Tap Restart > Restart.
  • The device will restart in standard mode and you can resume normal use.

Solution 4: Get the latest software updates

There’s a possibility that your phone is running on a software update that has bugs in it causing this restarting issue and that a new software update is available to fix these bugs.

You should try checking if a new software update is available and install it immediately.

Updating phone software

  • Go to your phone Settings.
  • Scroll down and tap on Software update.
  • Tap Download and install.

Once your phone is running on the latest version try to check if it still keeps on rebooting.

Solution 5: Perform a hardware test using the Samsung Members app

If a hardware component in your phone is is faulty then this can be what’s causing the rebooting issue. In order to check if your phone hardware is functioning properly you can use the Samsung Members app.

To perform a hardware test

  • Open Samsung Members.
  • Tap on Get help.
  • Under Diagnostics tap on Start.
  • Choose all possible selections.
  • Tap Start to run the test.

If the test fails then you need to contact the nearest Samsung service center in your area.

Solution 6: Wipe cache partition of Galaxy Z Flip 4

If your phone has corrupted system cached data then this might cause it to keep on restarting. You can try wiping the cache partition of your phone to fix this. This procedure does not delete your personal data as it will only rebuild the cached data.

Wipe cache partition

  • Turn off the device.
  • Press and hold the Volume Up key, then press and hold the Side key.
  • When the green Android logo displays, release all keys (‘Installing system update’ will show for about 30 – 60 seconds before showing the Android system recovery menu options).
  • Press the Volume down key several times to highlight wipe cache partition.
  • Press Power key to select.
  • Press the Volume down key to highlight yes, them and press the Power key to select.
  • When the wipe cache partition is complete, Reboot system now is highlighted.
  • Press the Power key to restart the device.

Once your device reboots try checking if the issue still occurs.

Solution 5: Perform a factory data reset on your Galaxy Z Flip 4

In case the problem is caused by a corrupted system software due to the update then a factory reset is highly recommended.

This procedure will delete your phone data and bring it back to its original condition. Any corrupted data stored in the operating system which could be causing this problem will be completely removed.

Before proceeding with this step you need to backup your phone files. Any photos, files, contact lists, or notes just to name a few that you have saved in your phone will be deleted so make sure to make a backup copy of these.

Factory reset

  • Turn off your Samsung Galaxy device.
  • Simultaneously press and hold the Volume up and side buttons until the device vibrates and the Android Recovery screen appears then release all buttons. Allow up to 30 seconds for the recovery screen to appear.
  • From the Android Recovery screen, select Wipe data/factory reset. You can use the volume buttons to cycle through the available options and the side key to select.
  • Select Factory data reset. Allow several seconds for the factory data reset to complete.
  • Select Reboot system now. Allow several minutes for the reboot process to complete.
  • Set up your Android phone.

After reset has completed don’t install any third party apps yet. Try checking first if the issue still occurs.

Solution 6: Contact the nearest Samsung service center

If the above troubleshooting steps fails to fix the problem then you should contact the nearest Samsung service center in your area and seek assistance regarding this matter.

Frequently Asked Questions

  1. What to do when my Z Flip 4 is stuck in recovery mode?

    To exit out of recovery mode use the Volume Up or Volume Down button to highlight the option Reboot system now. Press the Power button to confirm the selection.

  2. What to do when my Z Flip 4 is stuck in download mode?

    To exit out of download mode press the Power button and select Restart. Alternatively, press and hold the Volume Down and Side key at the same time for 7 seconds.

  3. How do I stop my Samsung reboot loop?

    The reboot loop on Samsung phones is usually caused by a software glitch. To fix this you should try to wipe the cache partition of the phone. If this doesn't work then try to do a factory reset.

  4. How do I force stop an app in Z Flip 4?

    You can perform this procedure by going to Settings > Apps > Select the App > Force Stop at the bottom > OK.

  5. How do I clear app cache data in Z Flip 4?

    Open your Settings and tap Apps.
    From the list of Apps that appears, tap on the app that is causing the issue.
    Tap Storage > Clear data or Clear cache.