Mobiles, or mobile phones, are portable communication devices that allow users to make calls, send texts, and access the internet. They have evolved from basic models to smartphones, which offer advanced features like cameras, apps, and touchscreens. These devices connect to cellular networks, enabling communication over long distances. Most mobiles also include features such as GPS for navigation and various sensors for health tracking. Popular brands include Apple, Samsung, and Google, each offering different models to cater to diverse user needs.