Peter Jones’s company Phones International primarily concerned mobile phones.
Phones International was a telecommunications business associated with Jones and formed part of the commercial background that helped establish his reputation before and during his time on Dragons' Den. The company operated in the mobile-phone market, a sector defined by rapidly changing devices, networks and consumer demand.
Jones has interests across several industries, so the business is sometimes confused with his later investments in media, leisure, technology and retail. The question focuses on Phones International itself, not on every company in his wider portfolio.
The mobile-phone connection also helps explain why Jones has often been associated with technology-oriented businesses on the programme. It should not be read as saying that all of his businesses were telecommunications companies.