Mobile telephone is one of the biggest scientific inventions gifted to the general people of the world. Radio telephony was restricted to certain departments of the governments and the general public could not get any benefit out of it. During the last half of the twentieth century the global sky save and except very remote and inaccessible areas where network could not be set up has been enclosed with web which transmit required signal to help communication among peoples all over the world. Technology developed very fast and small portable instrument known as mobile or cell phone has come to be a must holding by the poor people of the undeveloped countries of the world. (to be continued )
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