Device Guides

Samsung Galaxy S21 Ultra 5G

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Android 11.0

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This troubleshooting guide will take you through a number of possible causes to help you find a solution to your problem.

Possible cause 2:

There's an error in the operating system on your mobile phone: Restart your mobile phone.

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Tap the Side key.

At the same time, tap and hold the lower part of the Volume key and keep them both tapped until your mobile phone restarts.

Step 1 of 2

Tap the Side key.

Step 2 of 2

At the same time, tap and hold the lower part of the Volume key and keep them both tapped until your mobile phone restarts.

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