This only currently works only on iPhone devices.
This is not an app, it is not a pre-recorded message and the number they generate can be seen in your recent calls.
Imagine inviting someone to choose a playing card and to put it, out of sight, without looking at it. You then ask a selection of people to create a random mobile phone number. You phone the number they have created and, when the person answers the phone, you ask them to name any playing card. They name the card that was chosen by the spectator. This is a real reputation maker and one that we guarantee you will be performing. There are no mobile phone apps involved.
length 19 min 24 sec
