Are you Apple Watch series 1 or series 2 user? You didn’t find installed keys on your Apple Watch?
Please try the following steps:
- Press and hold the side button until you see the Power Off slider.
- Drag the slider to turn off your device.
- After your watch turns off, press and hold the side button again until you see the Apple logo.
- Keep the Smart Key application open on your iPhone while the Apple Watch restarting.