How to factory reset smartwatch when locked?
To reset a smartwatch to factory settings, back up your data, then use the Settings menu to erase all content and pair again. On iPhone or Android, you can also reset through the companion app. A forced reset is available from recovery mode if the watch is locked. On your Apple Watch, open the Settings app. Tap General, then tap Reset. Tap Erase All Content and Settings. Type your password if prompted.If you can’t turn off your Apple Watch or if the problem continues, you may need to force your Apple Watch to restart. Do this only if you’re unable to restart your Apple Watch. To force restart, hold down the side button and the Digital Crown at the same time for at least 10 seconds, until the Apple logo appears.