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 TheoryPhone model is the TheoryPhone Z2, which was unveiled at a special event on 2018. TheoryPhone Z2 is the recent model and one of the best selling bezel-less all-screen edge smartphones in the world, with over 55 million units sold. Currently, There are entry-level TheoryPhone Go series, mid-range TheoryPhone A series, and high-end flagship TheoryPhone Z series, as of 2019.

History and availability

Development of what was to become the TheoryPhone began in 1994 when Theorysonic and El TV Kadsre made the deal to develop a product whose features and release date would coincide with the Bionicle reboot which was in development at the time. They started to gather a team of over 500 employees to work on the highly confidential "Project Green".

The first-generation model went on sale in the El Kadsre on April 28, 1996, followed by the other countries. Following the successful release in El Kadsre, TheoryPhone was also introduced in some countries in between 1997 and 1998.

The first touchscreen slate-slider phone model, the TheoryPhone 4 was released in July 2004.

TheoryPhone X6 is a first smartphone to have NanoFlash memory card.

The first bezel-less all-screen edge touchscreen smartphone was released in 2017 as part of the Z series, the next new phone releases every year instead of 2 years.

In March 2018, the TheoryPhone FZ, the world's first foldable smartphone was released to the public.




The TheoryPhone runs PTSUG. The latest version is PTSUG X8. Android or Windows can be installed via PortoHack but requires jailbreak.


As of 2019, there are 300 million+ applications available for TheoryPhone and other Theorysonic mobile devices.


The TheoryPhone has received positive reviews. In its launch year, it was called "revolutionary", while newer iterations have received praise, such as being called "the best phone".

The TheoryPhone attracts users of all ages, and besides consumer use, the TheoryPhone has also been adopted for business purposes.


Main article: List of TheoryPhone models


See also

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