Which of the following statements is true about cellular service?

Cellular service provides mobile devices with the ability to connect to the Internet without needing a physical landline or Ethernet connection. This means that devices such as smartphones, tablets, and some laptops can access online services and data from virtually anywhere within the coverage area, enabling mobile internet usage for activities like browsing, streaming, and communication.

The other options do not accurately reflect the nature of cellular service. For instance, cellular service is not restricted to smartphones; a variety of devices can utilize it. Additionally, cellular networks can offer varying speeds, often being faster than older connection methods such as dial-up, and do not require an Ethernet connection, as they operate wirelessly over radio signals instead.