O2

O2 was a company whose base of operations in various countries was made from demergers from BT (British Telecom). Late in 2005, the Spanish company Telefonica bought O2 plc. Although O2's main area of business is realted to both fixed and mobile phone services, it also offers broadband services and also sells a range of wirelessly connecting PDA and smartphones branded as XDA. These XDA PDAs are often produced by multiple manufacturers such as Quanta, Erima, etc. Current models are the XDA Orbit and the XDA Stellar, earlier models include: O2 XDA II & XDA IIi, O2 XDA III & XDA IIs, O2 XDA I and O2 XDA II Mini all of which have been retired. As a company O2 is in direct competition with the likes of Orange, T-Mobile, Vodafone and many others besides.
Accessories for the following laptop manufacturers are available at PDA Accessories: Acer, Averatec, BenQ, Canon, Dell, Fujitsu, Gateway, Hitachi, HP, MacBooks by Apple, JVC, Mitsubishi, NEC, Nikon, Sony, Toshiba, Trigem, Viewsonic, WinBook, etc.