To enable call notifications on your Moto Watch 100, please follow these steps:

1. Open the Moto Watch app on your mobile device.
2. Tap on your profile picture in the top left of the dashboard.
3. Tap on your connected Moto Watch device
4. Tap on "Reminders & Alerts"
5. Scroll down and tap on "Calls."
6. Enable "Incoming call alerts", this will require access to phone status permissions if it has not been granted before.