Most modern mobile phones are Smartphones. A Smartphone is a mobile phone built on a mobile computing platform, with more advanced computing ability and connectivity than a simple mobile phone.
The earliest smartphones combined the functions of a Personal Digital Assistant (PDA) and a mobile phone. Current models can also act as portable media players, digital cameras, pocket video cameras and GPS navigation systems.
Modern smartphones generally have high-resolution touchscreens and web browsers that display standard web pages as well as those optimised for mobile devices. They also support data communications via WiFi or Mobile Internet.
Common smartphone operating systems include Google Android, Apple iOS, RIM BlackBerry OS and Microsoft Windows Phone. At present the most popular Smartphones are the Apple iPhone range and Android phones, available from various manufacturers.