TheoryPhone

TheoryPhone is a line of smartphones and mobile devices designed and marketed by Theorysonic. Their main operating system is PTSUG, and 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, followed by the other countries. TheoryPhone was also introduced in some countries in between 1997 and 1998.

Software
The TheoryPhone runs PTSUG. The latest version is PTSUG X7.

Applications
As of 2017, there are 5 million+ applications available for TheoryPhone and other Theorysonic mobile devices.