You can also call 1-888-382-1222 from any phone you want on the list. That's all it takes, and your number stays on the list until you ask for it to be removed or you give up the number.

Alternatively, you can stop the phone from calling out altogether by setting it to bar all outgoing calls. This does mean that your son won't be able to call you, though. Mobile Guides ...

Meet Sidecar, a new telephony app for iOS and Android that adds a wealth of cool, new content- and video-sharing features to the basic phone-calling experience.