What are SIM Cards?
A subscriber identity module, otherwise known as a SIM, is a circuit which stores networking information and subscriber information for a mobile device, such as a cell phone or computer. The subscriber identity module acts to uniquely identify an individual on the specific network, validating their right to use the network along with other specific information such as passwords and services to which the user has subscribed. Without a working subscriber identity module, the network capabilities of the associated device are thereby crippled. Think of a subscriber identity module as ticket allowing the end-user to see a movie or show. It provides them with access to the theater, the mobile network to which they are connecting. It does this by storing Integrated Circuit Card Identifiers (ICCID) numbers. Integrated Circuit Card Identifiers numbers are comprised by a combination of the identifier for the network carrier — such as the specific cell phone company — the cou...