What to do if your Samsung Galaxy device appears to keep restarting

Last Update date : 2026-08-18

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.

Phone screen displaying the optimisation process in progress.

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.

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.

Settings menu with Device care highlighted. Settings menu with Device care highlighted.

Step 1. Open Settings > Tap Device care.

Device care screen with the Optimise now button highlighted. Device care screen with the Optimise now button highlighted.

Step 2. Tap Optimise now to clean up the background memory.

Device care screen scrolled down with Auto optimisation highlighted. Device care screen scrolled down with Auto optimisation highlighted.

Step 3. Tap Auto optimisation.

Auto optimisation screen with Auto restart highlighted. Auto optimisation screen with Auto restart highlighted.

Step 4. Tap Auto restart.

Auto restart screen with the Restart when needed toggle switch turned on. Auto restart screen with the Restart when needed toggle switch turned on.

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.

Auto restart screen with the Restart on schedule toggle switch turned on. Auto restart screen with the Restart on schedule toggle switch turned on.

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.

Settings menu with the Apps option highlighted. Settings menu with the Apps option highlighted.

Step 1. Open Settings > Tap Apps.

Apps list with one sample app selected. Apps list with one sample app selected.

Step 2. Select the app you want to remove.

App info screen with the Uninstall button highlighted. App info screen with the Uninstall button highlighted.

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 app.

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