Tuesday, 28 December 2010
What is a Smart Phone Anyway?
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 one frequency band unfortunately cannot operate in another frequency band next to it unless added as a specific extra frequency band. To overcom
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