Samsung Galaxy Watch Ultra
No ring tone is heard on incoming calls
Solution 2 of 2: Do Not Disturb is turned on
If you don't want to be disturbed, you can turn on Do Not Disturb on your smartwatch. You will not receive calls, messages or notifications.
Slide your finger downwards starting from the top of the screen.
Press the Do Not Disturb icon to turn the function on or off.
Slide your finger upwards starting from the bottom of the screen to return to the home screen.