Cindy wants her phone to give her an audio notification when she has missed calls. The chatroom says it's an option under Accessibility, but Cindy says she's looked there.
There is also a place under Notifications in settings where she can get to it. She should go to Settings > Notifications > Phone, and then she can turn notifications for missed calls on or off there. SolveYourTech.com has an article on how to change these settings here. She can have it play any sound she wants, too.