What do I do if I sell my smart watch or get a new device?
You should restore the default settings on your Garmin smart watch. This will erase the app and personal data and delete the cards from the smart watch. Instructions are available on the Garmin website in the vívoactive 3 Owner Manual, under Restoring All Default Settings.
If you get a new Garmin smart watch, you can install Garmin Pay on the new smart watch and add your cards.