The technology essential for wireless communication in modern devices includes Wi-Fi, Bluetooth, and cellular networks. Wi-Fi provides high-speed internet connectivity for devices within a specific range, enabling seamless data exchange and online activities. Bluetooth allows for short-range communication between devices, supporting functionalities like file transfers and audio streaming. Cellular networks, including 4G and 5G technologies, offer extensive coverage for mobile devices, ensuring users can stay connected on the go. Together, these technologies make communication and data access more convenient and mobile.