The+Cell+phone

A mobile phone is an electronic device used for two-away radio telecommunication over a cellular network of base stations known as cell sites. Mobile phones differ from cordless telephones, which only offer telephone service within limited range through a single base station attached to a fixed land line, for example within a home or an office. A mobile phone allows its user to make and receive telephone calls to and from the public telephone network which includes other mobiles and fixed- line phones across the world. It does this by connecting to a cellular network owned by a mobile network operator. A key feature of the cellular network is that it enables seamless telephone calls even when the user is moving around wide areas via a process known as handoff handover.



Dr **Martin Cooper**, a former general manager for the systems division at Motorola, is considered the inventor of the first portable handset and the first person to make a call on a portable cell phone in April 1973. The first call he made was **to his rival**, Joel Engel, Bell Labs head of research.