To add children to your family, first ensure you have enough children on your plan to support them. Next, on the parent app, navigate to "Manage Family". On the top right hand corner of the screen you will see a small icon with a person and a plus symbol, tap this and begin filling the details required for your child, once these are filled out, you can press "NEXT" in the bottom right corner, select picture of a child and press "CREATE", again, in the bottom right corner of the screen.
Once you've done this, you should now see the new child has been added to your list of family members. On the right hand side of the new child row, you will be provided with a 5 digit one time use pairing code. To learn how to use that, please refer to "How do i setup and start using Supotco?" in the FAQs