From the Home screen, press the Power button to display the menu.
The Power button is located on the right edge.
Tap Settings .
Tap Connectivity .
Tap Cellular .
Tap SIM status.
View the following:
The number listed is the watch's (used for data service) and not your companion smartphone's number (used for voice service).
Your companion smartphone's phone number is typically viewed by navigating: Apps icon > Settings > About phone then tapping Status or SIM status. It can't be viewed from the watch's display and can only be viewed from the smartphone.
From the SIM Status screen, swipe right 3 times to return to the Settings screen.