In 1947 researchers in AT&T Bell Labs conceived the idea of cellular phones. They realized that by using small service areas or cells they can reuse the frequency. This in turn can enhance the traffic capacity of mobile phones. AT&T requested the Federal Communication Commission (FCC) CO allocate a large number of radio-spectrum frequencies so that widespread mobile telephone service would become feasible. FCC is a government agency in United States who regulates the usage and licensing of frequency bands. Every country has its regulatory agencies like FCC. In India the regulatory authority is TRAI (Telecom Regulatory Authority of India). FCC in USA is charged with regulating interstate and international communications by radio, television, wire, satellite and cable. Initially. FCC agreed to license a very small band to AT&T. This small frequency range made only 23 simultaneous phone conversations possible in one service area. With 23 channels there was no market incentive for either research or commercial deployment for AT&T. Though the idea of cellular was very much there in late forties, it did not take off.
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