Learn how to shut down your device. Turning your device off and on is a common first step of troubleshooting your device. You may also need to turn your device off if you're entering an area that does not allow cell phones.
Note: If you will not be wearing your Watch for an extended period of time, power it off to save battery.
Step 1 of 3:
Press and hold the Side button.
Step 2 of 3:
Drag the POWER OFF slider to turn your Watch completely off.