Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. A mobile phone - cellular phone or cell phone - is a handheld 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 which is provided by a mobile phone operator, and allows access to the public telephone network. In addition to telephony, modern mobile phones also provide numerous other services including text messaging, Multimedia Messaging Service, email, Internet access, short-range wireless communications, business applications, gaming and photography...