Mobile telephone service (MTS ) is a type of service where mobile radio telephones connect people to the public switched telephone system to other mobile telephones or to other communication systems like internet.
Cellular systems divide large geographic areas into small radio areas that are interconnected with each other. Each cell coverage area has one or several transmitters and receivers that communicate with mobile telephones within its area.
In the year 1996, the first internet connectivity enabled mobile telephone,Nokia communicator was released. Mobile phones or cell phones operate typically in Ultra High Frequency (UHF) range of 800 to 950 MHz.