The Call by Hiroshi Magic

100% Mind-blowing... 0% Apps
A "magician fooler" is a trick so devious, that experienced magicians have no explanation for how it was possible.
It's used as a mark of quality. Because if it fools pro-magicians, it will DESTROY complete laymen.
That is 'The Call'.
No apps
No NFC
Uses their phone
Even under these incredible conditions, they can choose any contact in their phone - and you can make that person call them.