Approved List contains list of numbers which the customer has approved- these numbers will be allowed to ring through to your phone.
To approve a phone number, just select the "+" and enter a number. You can also add a number to the Approved List by selecting the option in the long or short press menu from the Activity view or even from the Detail view.
NOTE: Select any number from your list to view additional details and options.
To remove a phone number, just select the "REMOVE" option (right hand side of list item) which will prompt you to remove the number from the Approved List.