Samsung Galaxy S21 Ultra
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Turning silent mode on or off
When silent mode is turned on, all phone sounds are turned off.
Step 1 of 3
Slide two fingers downwards starting from the top of the screen.
Step 2 of 3
Press the sound mode icon the necessary number of times to turn silent mode on or off.
Step 3 of 3
Press the Home key to return to the home screen.