GSM stands for Groupe Spécial Mobile. It is a standard set developed by the European Telecommunications Standards Institute (ETSI) to describe protocols for second generation (2G) digital cellular networks used by mobile phones.

GSM originally stood for Groupe Sp├ęcial Mobile, but since it went global, is often referred to as Global System for Mobile telecommunications. It is a standard set developed by the European Telecommunications Standards Institute (ETSI) to describe protocols for second generation (2G) digital cellular networks used by mobile phones.

Use this tag for questions related to any aspect of GSM systems.