When mobile communication was in its infancy, one country’s mobile phone system was incompatible with another’s system which increased costs and caused problems with communication. There has since been a massive growth in mobile telephone systems and a system was needed to resolve communication issues worldwide. Groupe Special Mobile (GSM ) was formed in Europe in the early 1980s with the aim of developing a system that could be used throughout Europe. It eventually expanded into a worldwide system. . . . → Read More: GSM Mobile Phone Networks
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