Joybubbles (May 25, 1949 – August 8, 2007), born Josef Carl Engressia, Jr. in Richmond, Virginia, United States, was an early phone phreak. Born blind, he became interested in telephones at age four.[1] He had absolute pitch, and was able to whistle 2600 hertz into a telephone, an operator tone also used by blue box phreaking devices. Joybubbles said that he had an IQ of "172 or something".[2] Joybubbles died at his Minneapolis home on August 8, 2007 (aged 58). According to his death certificate,[3] he died of "natural causes" with "congestive heart failure" as a contributing condition.
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