TheoryPhone

TheoryPhone is a series of smartphones and mobile devices designed and marketed by Theorysonic. They run PTSUG mobile operating system. The first generation model was released on April 28, 1996; the most recent Theoryhone model is the TheoryPhone X6, which was unveiled at a special event on 2015.

History and availability
Development of what was to become the TheoryPhone began in 1994.

The first-generation model went on sale in the El Kadsre on April 28, 1996.

Software
The TheoryPhone runs PTSUG. The latest version is PTSUG 10.5.