Cellular networks are communication systems that use a series of interconnected cells to provide wireless coverage over a wide area. Each cell is served by a base station, which connects mobile devices to the network. This structure allows for efficient use of radio frequencies, enabling many users to communicate simultaneously without interference. These networks support various services, including voice calls, text messaging, and internet access. They operate on different generations, such as 2G, 3G, 4G, and the latest 5G, each offering improvements in speed and capacity. Cellular networks are essential for modern communication, connecting people and devices globally.