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International Mobile Equipment Identity (IMEI)

Roel van der Meer

In the realm of mobile technology, IMEI serves as a crucial identifier, intricately tied to the unique characteristics of mobile devices. Let's explore the intricacies of IMEI, its significance, and its role in safeguarding mobile communication.

Deciphering the Essence of IMEI 

IMEI, or International Mobile Equipment Identity, stands as a 15 or 17-digit alphanumeric code meticulously crafted to uniquely identify mobile devices. Here's an in-depth look into the key components and functionalities of IMEI:

  • Unique Identification: IMEI serves as a digital fingerprint for mobile devices, providing a distinct identifier that sets each device apart. This unique code enables network operators and regulatory authorities to track and manage mobile devices effectively.

  • Storage and Retrieval: Typically stored in the battery compartment of mobile devices, the IMEI number acts as a crucial reference point for device identification and authentication. By accessing the IMEI database (IMEI DB), GSM operators can retrieve vital information about device type, features, and ownership status.

Unveiling the IMEI Number: Structure and Significance 

Explore the structured composition of the IMEI number and its underlying significance:

  • Format: The IMEI number follows a standardized format, typically represented as AA-BBBBBB-CCCCCC-D, where:

    • AA: Signifies the Reporting Body Identifier, showcasing the Type Allocation Code (TAC) approved by GSMA.

    • BBBBBB: Represents a six-digit number denoting the TAC digits allocated to the device.

    • CCCCCC: Identifies a six-digit number indicating the model sequence of the mobile device.

    • D: Represents the algorithm utilized for validating the ID number, such as the LUHN check digit or 0.

  • Authentication and Security: IMEI plays a crucial role in bolstering device security, especially in scenarios involving theft or unauthorized use. By enabling IMEI tracking within GSM or UMTS networks, operators can swiftly identify and block devices associated with illicit activities, safeguarding both users and network integrity.

Locating the IMEI Number: A Handy Guide 

Discover the various methods to locate the IMEI number on mobile devices:

  • Battery Compartment: The IMEI number is often engraved or printed on a label within the battery compartment of mobile devices. Simply remove the battery cover to access this crucial identifier.

  • Device Settings: In some cases, users can access the IMEI number directly through their device settings. Navigate to the "About Phone" or "Device Information" section to locate this vital piece of information.

  • Dialer Code: Another convenient method involves dialing *#06# using the device's dialer app. This action prompts the device to display the IMEI number on the screen, eliminating the need for physical inspection.

Samenvatting

Een IMEI-nummer (International Mobile Equipment Identity) is een 15- of 17-cijferig uniek nummer dat wordt gegenereerd door een internationale organisatie die toezicht houdt op netwerkexploitanten, de Groupe Speciale Mobile Association (GSMA). Het wordt meestal opgeslagen in het batterijcompartiment van mobiele toestellen en wordt gebruikt om mobiele stations te identificeren. De verzameling IMEI-nummers wordt opgeslagen in de IMEI-databank (IMEI DB) die door de GSM-associatie aan haar leden wordt verstrekt. Hiermee kunnen GSM-exploitanten het type toestel van de klant en de bijbehorende kenmerken kennen. De IMEI-code kan worden ingeschakeld in Global System for Mobile communication (GSM) of Universal Mobile telecommunication Service (UMTS) netwerken om ongeoorloofd gebruik van de handheld toestellen te voorkomen in geval van diefstal of zoekgeraakte toestellen.

IMEI is meestal in het formaat AA-BBBBBB-CCCCCC-D. waarbij 

  • AA: beschrijft de identificatiecode van de rapporterende instantie met de code voor de toewijzing van het type (TAC) per GSMA-goedkeuringsgroep

  • BBBBBB: is een getal van zes cijfers dat de TAC cijfers weergeeft

  • CCCCCC: is een getal van zes cijfers dat de opeenvolging van het model van het mobiele toestel weergeeft

  • D: is het algoritme dat wordt gebruikt om het ID-nummer te valideren. Dit algoritme kan een LUHN-controlecijfer voor het model zijn of 0

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