Why does my Samsung Galaxy phone keep restarting?

Discover why your Samsung Galaxy phone restarts unexpectedly and learn how to fix it with solutions for auto restart settings, third-party apps, software updates, and more.

If your Samsung Galaxy phone restarts unexpectedly without any user interaction, it could be due to the Auto restart feature, unstable apps, software updates, or hardware issues. Follow this guide to identify and resolve the problem efficiently.

1. Why does my Samsung Galaxy phone keep restarting?

Unexpected restarts on your Samsung Galaxy device can stem from several causes, including:

- The Auto restart feature in Device Care is enabled, causing scheduled restarts.

- Unstable third-party apps or recent software updates causing system instability.

- Critical security patches requiring automatic reboots.

- Hardware or battery issues leading to unexpected shutdowns.

2. How to turn off Auto restart in Device Care

The Auto restart feature is designed to optimize device performance by restarting your phone at scheduled times. However, if it's causing unexpected restarts, you can disable it:

1. Open the Settings app on your Samsung Galaxy device.
2. Scroll down and tap on Device Care.
3. Select Battery from the menu.
4. Tap on the three-dot menu in the top-right corner and choose Auto restart.
5. Toggle off the Auto restart option.

Note: Auto restart is only active when the screen is off, the device is not in use, the battery level is above 30%, and the SIM card lock is turned off.

3. How to fix issues caused by unstable third-party apps

If your phone restarts randomly, it could be due to unstable apps consuming excessive memory or interfering with core services. Here's how to resolve it:

1. Identify and uninstall recently installed or suspicious apps:
2. Go to Settings > Apps.
3. Review the list of installed apps and uninstall those you don't recognize or no longer use.
4. Test your device after each uninstallation to identify the problematic app.

If the issue persists, perform a diagnostic test using the Samsung Members app:

1. Open the Samsung Members app.
2. Tap on Get Help and select Phone diagnostics.
3. Follow the on-screen instructions to run a full diagnostic test.

Note: The Phone diagnostics feature is available on Galaxy devices with the Samsung Members app installed.

4. When updates may cause restarts

Your Samsung Galaxy phone may restart automatically after installing critical security patches or software updates. This is normal behavior and helps maintain device security and performance.

Additional things to check:

- Ensure your device has sufficient storage space for updates.

- Verify that your Wi-Fi connection is stable during updates.

- Enable Auto restart in Device Care to maintain optimal performance.

5. Supported Samsung Galaxy devices

This guide applies to the following Samsung Galaxy devices:

Galaxy S24, Galaxy S25, Galaxy S26, Galaxy Z Fold, Galaxy Z Flip, Galaxy A series.

6. Related Samsung support topics

- How to free storage space on Samsung Galaxy devices

- How to use Smart Switch on Samsung Galaxy phones

- How to clear cache files on Samsung Galaxy devices