Các tế bào connetion P3

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Các tế bào connetion P3

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THE BUSINESS OF CELLULAR PHONES The business of cellular phones is a big one. Although cellular phone companies must make a large initial investment, the potential for an enormous return makes it certain that there will be no shortage of firms to service the cellular user. WHERE CAN YOU GET CELLULAR SERVICE? Cellular service was deployed beginning in 1983 in order of city population, with licenses for the largest cities awarded first. While some potential users have had to wait for service in smaller cities, in 1992 the last tertiary markets established commercial service....

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