From a watch face, tap the Home button.
Tap the Contacts icon.
Tap the Add contact icon.
Tap the Name field.
Enter the contact's full name.
Tap Done.
Tap the Phone field.
Enter the contact's phone number.
Tap Done.
If the contact has another phone number, follow the steps 7-9 for Phone number 2.
Tap Save.
You've completed the steps!
