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A mobile phone, popularly known as a cell phone, is a mobile device used for voice and data communication over the network of base stations, sites where antennas and electronic communication equipment together create a cell in a mobile phone network. As we all know, the mobile phones of today are used for many other purposes than the standard voice function, which is the primary purpose of a mobile phone. Today, mobile phones are used for text messaging by means of SMS, for sending and receiving videos and photographs by means of MMS and for email and Internet services by means of GPRS. The mobile phones of the modern times also support technologies like infrared and bluetooth, thus enabling inexpensive ways of communication. For most of us, our mobile phone is one technological devise that we cannot do without. We need it with us everywhere
mobile phone is a two-way radio, as it sends and receives radio signals with cell site base stations. When a person talks on a cellular phone, the voice message gets converted into radio waves. The radio waves travel through air until they reach a base station close by. The base station sends the call across the communication network after which the call reaches the intended receiver of the call. The base station in the vicinity of the mobile phone being called sends the radio waves for the receiver's devise to detect them. The mobile phone of the receiver converts the signals into voice and the phone call takes place.

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