How to Fix Samsung Galaxy S20 That Keeps Rebooting

The Samsung Galaxy S20 can get stuck in a reboot loop where it keeps restarting on its own without reaching the home screen. This is usually caused by a software glitch, a problematic app, or corrupted system files, and the following methods will fix it.

Method 1: Force Restart

A force restart can break the reboot loop by clearing the current system state.

1. Press and hold the Volume Down button and the Power (Side) button at the same time.
2. Keep holding both buttons for 10 to 15 seconds.
3. Release when the Samsung logo appears.
4. Wait for the phone to fully boot up.

Method 2: Charge Your Phone

A critically low battery can cause the phone to repeatedly attempt to boot and then shut down due to insufficient power.

1. Connect your phone to the original charger.
2. Let it charge for at least 30 minutes without trying to turn it on.
3. After charging, try a force restart.

Method 3: Boot into Safe Mode

Safe Mode disables all third-party apps. If the phone works normally in Safe Mode, a downloaded app is causing the reboot loop.

1. Turn off the phone.
2. Press and hold the Power button until the Samsung logo appears.
3. Release the Power button and immediately press and hold the Volume Down button.
4. Keep holding until the phone finishes restarting and shows “Safe mode” in the bottom left corner.
5. If the phone is stable in Safe Mode, uninstall recently downloaded apps one at a time.
6. Restart normally to exit Safe Mode.

Method 4: Check for Software Updates

A software bug may be causing the reboot loop. Updating to the latest firmware can fix known issues.

1. If you can access the phone, go to Settings, Software update, Download and install.
2. Install any available updates.
3. Restart the phone after updating.

Method 5: Wipe the Cache Partition

Corrupted system cache files can cause boot loops. Wiping the cache partition does not delete personal data.

1. Turn off the phone completely.
2. Press and hold the Volume Up and Power buttons simultaneously.
3. Release both when the Android Recovery menu appears.
4. Use Volume Down to highlight “Wipe cache partition.”
5. Press the Power button to select it.
6. Select “Yes” and wait for the process to complete.
7. Select “Reboot system now.”

Method 6: Factory Reset via Recovery Mode

If nothing else works, a factory reset through recovery mode can fix deep software corruption. This erases all data, so back up if possible.

1. Turn off the phone completely.
2. Press and hold the Volume Up and Power buttons simultaneously.
3. Release when the Android Recovery menu appears.
4. Use Volume Down to highlight “Wipe data/factory reset.”
5. Press Power to select, then select “Factory data reset.”
6. Wait for the reset to complete and select “Reboot system now.”

Method 7: Contact Samsung Support

If the phone continues to reboot after a factory reset, the issue is likely hardware-related.

1. Visit samsung.com/us/support and select your device.
2. Contact support via chat, phone, or email.
3. Visit a Samsung authorized service center or uBreakiFix for in-person repair.