The identification number associated with a SIM card, when utilized within the Android operating system, serves as a unique identifier for that particular card and the mobile network account it represents. This numerical sequence is essential for network authentication and service provision. It’s a crucial piece of information for identifying the user’s mobile subscription. A user attempting to register a new device to their mobile account might require this identification to complete the association.
This identifier plays a vital role in cellular network connectivity and proper billing. The ability to quickly and accurately retrieve this number is valuable when dealing with carrier services, troubleshooting network issues, or activating new services tied to a mobile account. Historically, obtaining this number involved physically removing the SIM card. Modern Android systems have streamlined this process, offering various methods for access directly within the operating system.