A smartphone is a full-featured mobile phone with personal computer like functionality. Smartphones are often simply high-end mobile phones. So in many ways price-range and a base-line of higher end features define smartphones. A full-fledged email support seems to be a characteristic key defining feature found in all existing and announced smartphones as of 2007. Most smartphones are camera phones that support full featured email capabilities with the functionality of a complete personal organizer.
An important feature of most smartphones is that applications for enhanced data processing and connectivity can be installed on the device, by contrast to regular phones which support sandboxed applications. These applications may be developed by the manufacturer of the device, by the operator or by any other third-party software developer. "Smart" functionality includes any additional interface including a miniature QWERTY keyboard, a touch screen, or even just secure access to company mail, such as is provided by a Blackberry.
