![]() The first commercial cellular network was launched in Japan by Nippon Telegraph and Telephone (NTT) in 1979, initially in the metropolitan area of Tokyo. ![]() Cellular technology employ a network of cells throughout a geographical area using low-power radio transmitters. 1G refers to the very first generation of cellular networks. "0G"), where portable phones would connect to a centralised operator. The antecedent to 1G technology is the mobile radio telephone (i.e. Many 1G networks were switched off in developed economies by 2000, but in some places networks continued to operate into the 2010s. The inherent advantages of digital technology over that of analog meant that 2G networks went on to eventually completely replace them. There were many different 1G cellular standards developed and used in different countries, but the most widely adopted globally were the Nordic Mobile Telephone (NMT) and Advanced Mobile Phone System (AMPS) systems. The main difference between these two mobile cellular generations is that the audio transmissions of 1G networks were analog, while 2G networks were entirely digital. These are mobile telecommunications standards that were introduced in the 1980s and were superseded by 2G. 1G refers to the first generation of cellular network (wireless) technology. ![]()
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