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Mobile Telephone ServiceIn 1946 in St. Louis, the Mobile Telephone Service was introduced. Although it was popular and commercially successful, the service was limited by having only a few voice channels per district.
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Martin Cooper 3 April 1973, Martin Cooper, a Motorola researcher and executive, made the first analog mobile phone call using a heavy prototype model.
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Prior to 1973, cellular mobile phone technology was limited to phones installed in cars and other vehicles
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Radio Cooper of Motorola is the first inventor named on "Radio telephone system" filed on 17 October 1973 with the US Patent Office.
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In 1979 a cellular network (the 1G generation) was launched in Japan by NTT
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VodafoneVodafone made the UK's first mobile call at a few minutes past midnight on 1 January 1985
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The first machine-generated SMS message was sent in the UK on 3 December 1992 followed in 1993 by the first person-to-person SMS sent in Finland.
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By 2009, it had become clear that, at some point, 4G networks would be overwhelmed by the growth of bandwidth-intensive applications like streaming media