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Chapter 25 Understanding Mobile Devices (220-902)

Terms in this set (41)

There are three identifiers you will need to understand for the exam and real-life management of mobile devices.

The International Mobile Equipment Identity (IMEI) number is a 15-digit number used to uniquely identify a mobile device, typically a smartphone or other device that connects to a cellular network. IMEI numbers are unique to the Global System for Mobile Communications (GSM) family of devices, including current devices that descended from GSM technologies (4G LTE and LTE-Advanced). You can find the number printed on the inside of the device or inside the OS configuration settings. IMEI can be used to identify a specific device and even to block that device from accessing the carrier's network. So if the device is lost or stolen the customer can notify the carrier and the carrier and block the phone from being used on their network.

The ICCID number, Integrated Circuit Card Identifier, uniquely identifies a subscriber identity module (SIM). The SIM contains information unique to the subscriber (owner of the phone), and is used to authenticate the subscriber to the network. SIMs can be move from phone to phone, usually with no problems.

The third number is the International Mobile Subscriber Identity (IMSI) number. It is also included on the SIM, it represents the actual user associated with the SIM. This number is normally not available on the phone and you usually have to get it from your carrier, to ensure that stolen phones are not misused. The IMSI number can be used to unlock a phone as well.

Simple: The IMEI number represents the device. The IMSI number is tied to the user's account with the carrier, and is included with the SIM.