셀 (Cellular) refers to the technology that enables mobile communication through a network of interconnected cells. Each cell is served by a base station, allowing for efficient use of radio frequencies and enabling users to make calls, send messages, and access the internet on their mobile devices. This system supports a wide range of services, including voice calls and data transmission. The cellular network operates on various standards, such as 2G, 3G, 4G, and 5G, each offering different speeds and capabilities. These advancements have significantly improved mobile connectivity, allowing for faster downloads, better video streaming, and enhanced overall user experience.