To communicate with people who are in long distance without direct physical connection of wires or cables was made possible with mobile communication. A wireless medium such as mobile phone, is the electric device which connects to a wireless carrier network by using waves. Cell phones make use of radio waves to establish a communication channel. Types of mobile communication are public land radio, mobile two-way radio, mobile telephone and amateur radio. The mobile two-way radios one to many communication system which enables push to talk service. Mobile phone usage began as a simple two way analogue system for communicating, later digital system came up with improvements in performance. Evolution of cell phones was with adding on features. This evolvement is from 1G to 4G, that is each generation proved having extra additional characteristics when compared to previous ones. More information about this topic can be understood from the powerpoint presentation.

Payal Jain

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