ĢG networks developed as a replacement for first generation ( 1G) analog cellular networks. By the mid-2010s, it became a global standard for mobile communications achieving over 90% market share, and operating in over 193 countries and territories. It was first deployed in Finland in December 1991. The Global System for Mobile Communications ( GSM) is a standard developed by the European Telecommunications Standards Institute (ETSI) to describe the protocols for second-generation ( 2G) digital cellular networks used by mobile devices such as mobile phones and tablets. The dots symbolize three clients in the home network and one roaming client. ![]() ![]() ![]() The GSM logo is used to identify compatible devices and equipment.
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