LG Watch Urbane 2nd EDITION 3G User Manual page 109

You can get an instant alert when your phone receives an incoming call.
The notification displays the caller's number or contact on your phone and
lets you accept or decline the call.
NOTE
if you had set the connected watch to the Call audio mode in your phone's
Bluetooth settings screen, you can receive the call.
Swipe right to
answer a call
You can change what notifications show up on your watch and when.
To change the interruption settings, swipe down from the top of your
watch's screen. You'll see a set of interruption options.
Do not disturb
NOTE
Some content may differ from your device depending on the OS version.
How to Use Your Watch
Incoming call
notification
Off or Alarms only.
Swipe left to
reject a call
36