Most telephone psychic clients are repeat customers, who rely on their telephone psychic to provide accurate and timely advice that is pertinent to their lives. It is all done over the phone. Phones provide an instant connection between callers and psychics. As a supernatural advisor, it is imperative to build trust and credibility with your clients by using a calming and interested voice and by being able to solve problems and answer questions without ever seeing the person on the other end of the line.
I was 13 when my mom dragged my brother and me to a "psychic." We were visiting family in Malaysia and somewhere amongst a few palm oil plantations was the house of an old woman who claimed to be able to channel Buddha. My mother was enthralled during the hour-long ordeal, during which the woman basically rolled her eyes often so the whites were showing, dropped her voice a few octaves, and made astonishingly mundane statements that could've applied to anyone (examples: our house had ants out front; my grandma was old and having some health problems). Combined with my love of Harry Houdini (who spent the last few years of his life debunking psychics and mediums) and teen angst that made me hate everything my parents liked, the experience left me convinced that psychics were con artists who separated vulnerable and desperate people from their cash in exchange for poor acting.
In 1880 the American stage mentalist Washington Irving Bishop published a book revealing how mediums would use secret codes as the trick for their clairvoyant readings. The Seybert Commission was a group of faculty at the University of Pennsylvania who in 1884–1887 exposed fraudulent mediums such as Pierre L. O. A. Keeler and Henry Slade. The Fox sisters confessed to fraud in 1888. Margaret Fox revealed that she and her sister had produced the "spirit" rappings by cracking their toe joints.