What is the primary function of cellular radio?

The primary function of cellular radio is to operate in frequency bands specifically allocated for mobile communications. Cellular radio technology enables mobile devices, such as smartphones, to connect to a network by utilizing radio waves to transmit voice and data. This involves dividing geographical areas into cells, each served by a base station, which allows for seamless communication and handoff as users move. The technology enables various mobile applications and services, including voice calls, texting, and data transmission, facilitating mobile connectivity across vast areas without dependence on fixed landlines or satellite connections.

The other options do not accurately describe the core function of cellular radio. Internet connectivity via satellite refers to a different technology that enables access to the internet in remote areas, while landline communication is not a function of cellular radio, which is strictly mobile. Lastly, while cellular networks can provide broadband service, that is not their primary function; their main role is facilitating mobile communication through radio frequency.