To set the last 8 digits of your PCCW SIM card number as the child phone number for both watches, follow these steps: Open the Circle App, go to 'Settings,' then select 'Child's Device' and click on 'Phone Number.' Enter the last 8 digits of your PCCW SIM card number, and save the changes.
After setting up the child phone number, proceed to pair the watches and add friends by connecting both watches via wireless connectivity or BT .