Psychic Hotline by Mentalist Mike Kempner

A spectator names any card in the pack (yes, it can literally be ANY card), and she calls up a mind-reader. When he comes to the phone, he is asked by the spectator to name of the chosen card, and he names it immediately. The mentalist (you) does not say a single word to the psychic! Any phone can be used, anybody can be called! Absolutely no props, gimmicks, or apps are used in this effect!