You may follow the quick guide share below:-
Step-by-step guide on how to add watch as Friends on myFirst Fone S3 with myFirst Fones series:
1. Place the two watches near each other
2. Turn on both watches' Bluetooth
3. Head to Contacts
4. Drag the Contact List menu down to reveal Add Friends Button. Click on the button
5. Click on Start Button
6. The Two watches are now Friends