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Definition of "mainstream" for cellular networks 2G onwards

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    Definition of "mainstream" for cellular networks 2G onwards

    My definition of "mainstream" for network generations 2G onwards is when services are introduced on the lower frequency (<1 GHz) bands after services are introduced on the higher frequency (>1 GHz) bands - 2G immediately became mainstream in many countries (with North America being one of the exceptions) when GSM networks started operating, and Singapore was a country which did not make 3G mainstream.
    Typically, it takes 3 to 4 years for a network generation 2G onwards to become mainstream; North America was particularly slow to make 2G mainstream, and Australia made UMTS 3G mainstream about a year after services were introduced by Telstra.
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