A mobile device operating on the Android operating system and equipped with a Subscriber Identity Module (SIM) card allows connectivity to cellular networks. This configuration enables the device to make calls, send text messages, and access mobile data services. For example, a smartphone sold by Samsung or Google, pre-installed with Android and requiring a SIM card from a mobile carrier for activation, represents a typical implementation.
This arrangement is fundamental to the modern mobile communication landscape. The inclusion of a SIM card facilitates user identification and authentication on cellular networks. It provides access to crucial services, permitting communication and data transfer while the device is mobile. Historically, this functionality evolved from earlier mobile phone systems, transitioning from bulky, less portable devices to the sleek, feature-rich smartphones prevalent today.