Smartphones utilize touch screen technology, which features capacitive or resistive screens that detect touch through finger movement or pressure. Capacitive screens, commonly found in modern smartphones, work by sensing changes in electric fields when a finger touches the screen. This technology enables users to interact intuitively with their devices through taps, swipes, and gestures. Touch screens facilitate quick access to apps, navigation, and multimedia, thus enhancing the overall user experience and making smartphones more versatile and engaging.