Global System for Mobile Communications (GSM)

The Global System for Mobile Communications (GSM) is a standard for mobile phones that enables voice and data communication. First developed in the 1980s, it is widely used around the world for mobile networks. GSM allows users to make calls, send text messages, and access mobile internet. It operates using radio frequencies and employs a digital signal, which improves call quality and security. GSM also supports features like SIM cards, enabling users to switch phones without losing their numbers or contacts. Today, it forms the foundation for many modern mobile communication technologies.