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Samsung Galaxy S21 5G / Galaxy S21 Ultra 5G - Restart Device

Here's how to restart your Galaxy S21 5G / Galaxy S21+ 5G / Galaxy S21 Ultra 5G if it crashes and resets, freezes or runs slowly.

Restarting your Galaxy S21 5G / Galaxy S21+ 5G / Galaxy S21 Ultra 5G can help if you experience continuous resetting / rebooting, crashing, freezing or if the touchscreen is unresponsive.

Since this device has a non-removable battery, the restart (soft reset) process can be used to simulate a 'battery pull' when the device is unresponsive, frozen or doesn't power on.

In rare cases, a restart could affect data (e.g., backup in progress, cached data, etc.).

Preferred Method

Press and hold the

Side button

and

Volume down button

(right edge) until the 'Power off' prompt appears then release.

If the device is unresponsive, attempt the alternate method.

Tap

Restart

To confirm, tap

Restart

Allow up to 30 seconds for the reset to complete.

Alternate Method

Simultaneously press and hold the

Side button

and

Volume down button

(right edge) until the screen goes dark (approximately 15 seconds) then release.

Allow up to 15 seconds for the Samsung Galaxy screen to appear.