The "Do Not Disturb" mode mutes all calls and signals on the Samsung device. The "Do Not Disturb" mode can be turned on/off manually or according to a schedule. Exceptions such as the alarm clock, calls and messages from specific contacts or media can also be allowed.

Note: The "Do Not Disturb" mode can also be switched on/off via the quick settings.

Android 10 (One UI 2.0)
Step 1:  Open the  Settings
Step 2:  Tap on  Notifications
Step 3:  Enable or disable  Do not disturb
  1. Open the Settings
  2. Tap on Notifications
  3. Enable or disable Do not disturb

Samsung Instructions
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