GSM architecture

GSM (Global System for Mobile Communications) architecture organizes how mobile phones connect and communicate. It has three main parts: the Mobile Station (your phone), the Base Station Subsystem (cell towers that connect calls wirelessly), and the Network & Switching Subsystem (which routes calls and data). Your phone communicates wirelessly with nearby cell towers, which connect to larger networks that handle call routing, messaging, and internet services. This structure ensures seamless communication, coverage, and security across mobile networks.