What to do if your Samsung Galaxy device appears to keep restarting
Important Note: The information on this page is for Hong Kong products only. Models, sequences or settings will vary depending on location and/or where the product had been purchased. To be redirected to your local support page please click here.
If your Samsung Galaxy device restarts automatically, settings such as Auto optimisation or scheduled restarts may be causing the behaviour. In some cases, software updates, recently installed apps, or third-party applications can also trigger unexpected restarts. Follow the steps below to check Auto optimisation settings, review restart schedules, and troubleshoot other common causes of automatic restarts on your Galaxy device.
Note:
- Emergency security updates may restart the device automatically even when automatic software download settings are turned off, depending on your country or region.
- Menu names, settings, and screen layouts may vary depending on the model and software version.
Symptoms
- Your phone restarts at specific times without any notice.
- Restarting occurs even when the battery is sufficiently charged.
- The restart may happen repeatedly or at scheduled times.
Why this happens
Samsung Galaxy devices include an Auto restart feature that helps keep the device running smoothly by restarting it at scheduled times. However, this can sometimes cause unexpected restarts if enabled unintentionally.
You can enable Auto optimisation to automatically improve device performance by clearing unused apps, freeing memory, and restarting the device when necessary.
If you do not want the device to restart automatically, turn off these features.
Step 1. Open Settings > Tap Device care.
Step 2. Tap Optimise now to clean up the background memory.
Step 3. Tap Auto optimisation.
Step 4. Tap Auto restart.
Step 5. Enable Restart when needed. Your device will restart automatically when memory usage increases or if it has not been restarted for a period of time.
* You must unlock your device to check messages and notifications normally after it restarts.
Step 6. Enable Restart on schedule. Your device will restart automatically on your selected date and time.
Note:
- Even if both Restart when needed and Restart on schedule are turned off, a system restart may still occur depending on your device’s condition.
- Auto restart only runs when the device is not being used. By default, the screen must be off and the battery level must be at least 30%.
If your Galaxy device continues restarting unexpectedly after Auto restart settings have been disabled, a third-party app may be causing the issue.
Symptoms
- Your phone restarts at random during normal use or when not in use.
- The restart pattern is irregular and hard to reproduce.
- The issue began occurring after installing or updating certain apps.
Why this happens
Some third-party apps may cause system instability by consuming excessive memory or interfering with core services. Also, after applying a critical security patch, the system may require an automatic reboot even if auto updates are turned off.
How to remove recently installed or suspicious apps
Follow these steps to remove any app that may be affecting your phone:
Step 1. Open Settings > Tap Apps.
Step 2. Select the app you want to remove.
Step 3. Tap Uninstall.
Note: The app shown in example images is a sample app created for demonstration purposes only and is not an actual suspicious app.
If the above information does not match what your product is showing, you may check the User Manual for your product. If you are unable to solve the problem, please contact us for further assistance.
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