Life without a mobile phone ... How can we survive without them? A statement of fashion status symbol, luxury, necessity, the way mobile phones, one of the most important technological advance was. But we, who are these "elements", of course, always think about the underlying technology? Mobile telephony based on simple concepts. It looks like a two-way radio in the chain switched telephone network, similar to the functionality of its conventional counterpart. We used to radio, by the security forces, police, etc. organizers, but phones are not only easily accessible, they were more personal in nature.
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