A lot of professionals today cant leave their homes without their cell phones. The cell phone is no longer a luxury nowadays; it is already a necessity so that an individual can be reached at any time of the day or night. Do you know the history of cell phones?
The cell phone only came into existence in the late part of the seventies. Illinois Bell was the one who tested the first cell phone in Chicago, Illinois. The test was successful however, it was only in the mid eighties when service carriers started their operations. The frequency band used back then was 800-900 MHz. Several years ago, the cell phones were still bulky units. Radio signals of the service carriers often interrupt or interfere with that of commercial radios. Before, cell phone service was costly and unreliable due to the limited channels available.
Because of the increasing demand for cellular phones all over the globe, new service carriers were approved by the FCC or Federal Communications Commission in the mid nineties. Way back in 2001, there are already over 120 million subscribers of wireless phones in the US and who knows how much it has increased over the past seven years. The...
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