After pairing the watch with the Nothing X app, go to: My Devices > Device settings > Frequent contacts > Add (up to 30 contacts can be added).
1. For Android:
- In the Frequent Contacts feature interface, tap Add.
- The phone's contact list will pop up. Select the contacts to add to the app, and the app will automatically sync to the watch.
2. For iOS:
- In the Frequent Contacts feature interface, tap Add.
- An input box will pop up. Manually enter the contact information and save it. The app will automatically sync to the watch.