Mobile phone

A mobile phone (also known as a cellular phone, cell phone and a hand phone) is a device that can make and receive telephone calls over a radio link whilst moving around a wide geographic area. It does so by connecting to a cellular network provided by a mobile phone operator, allowing access to the public telephone network. By contrast, a cordless telephone is used only within the short range of a single, private base station.
In addition to telephony, modern mobile phones also support a wide variety of other services such as text messaging, MMS, email, Internet access, short-range wireless communications (infrared, Bluetooth), business applications, gaming and photography. Mobile phones that offer these and more general computing capabilities are referred to as smartphones.
The first hand-held mobile phone was demonstrated by Dr Martin Cooper of Motorola in 1973, using a handset weighing around 1 kg.^[1] In 1983, the DynaTAC 8000x was the first to be commercially available. In the twenty years from 1990 to 2010, worldwide mobile phone subscriptions grew from 12.4 million to over 4.6 billion, penetrating the developing economies and reaching the bottom of the economic pyramid.^[2][3][4][5]

An Introduction to the Windows Phone 7 Development Platform

On Sep 16th 2010, Microsoft made available the RTW (Released to Web) version of the development platform for Windows Phone 7. In some ways, for many of you, parts of this will be a re-introduction to technologies you already know or with which you have become familiar. This is great news because it means you can become productive very quickly, and that’s no mistake. If you are wondering whether this platform is going to be a success then consider that there are millions of developers out there with existing skills which they can already leverage to build applications for Windows Phone 7. Even for those who have never used tools like Visual Studio before, the barrier for entry is low because the basic toolset has been made available completely free of charge!