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Cell phones have gained considerable popularity in the world. It is not surprising that it is the one gadget that accompanies more and more people. While many people still use cell phones as originally designed for making and receiving calls, a greater segment of society is beginning to see it as an instrument for productivity. For this reason, cell phones are constantly evolving to meet the new demands of society
Cell phones have in recent years been transformed into mini-computers dubbed...
•Smart Phone Is A Portable Computer
Cell phones operate on the same principles as radio broadcast. They use radio waves to transmit conversations. These radio waves can be at different frequencies, just in the same way as regular radio stations broadcast at different frequencies.
Cell phones that conform to the most popular standard for mobile phones, Global System for Mobile (GSM) communication, use frequencies within 5 different frequency bands measured in Megahertz: 850, 900, 1800, 1900 and 2100 MHz. A phone that works in...
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