GSM

GSM stands for Global System for Mobile Communications.

It's a digital mobile network technology that allows mobile phones to work across different networks and countries.

GSM was developed to replace older analog systems, providing a global standard for mobile communications.

It supports voice calls, text messaging, and basic data services, and is widely used in Europe and other parts of the world.

GSM is the technology behind 2G cellular networks and is known for its use of SIM cards, which make it easy to switch devices or carriers