It is widely belief that psychics gain their power from whether or not spiritual gift or themselves ability to use their brain more efficaciously.
Because phone psychics wouldn't have the benefit to "cold reading" cues. http://cse.google.com.ai/url?sa=i&url=http%3A%2F%2FTest1.pagei.gethompy.com%2Fbbs%2Fboard.php%3Fbo_table%3Dfree%26wr_id%3D80765