23. IMEI, IMSI, ICCID, MSISDN

• PHONE: IMEI

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The IMEI (International Mobile Equipment Identity) is a unique number to identify GSM, WCDMA, and iDEN mobile phones, as well as some satellite phones. Mostly phone have one IMEI number, but in dual SIM phones are two.

The Structure of an IMEI Number
IMEI numbers either come in a 17 digit or 15 digit sequences of numbers. The IMEI format currently utilized is AA-BBBBBB-CCCCCC-D:

AA: These two digits are for the Reporting Body Identifier, indicating the GSMA approved group that allocated the TAC (Type Allocation Code).
BBBBBB: The remainder of the TAC (FAC)
CCCCCC: Serial sequence of the Model (SNR)
D: Luhn check digit of the entire model or 0 (This is an algorithm that validates the ID number) (CD)

http://www.imei.info/faq-what-is-IMEI/


Usage:

The network requests the phone to report it's IMEI at power ON and it can:

• check it against the list of stolen phones and it could deny the phone registration in the network
• assign the IMEI to the phone number (in fact IMSI) and keep it in a database
• use the IMEI in the billing files
• use the IMSI for statistics of the types of phones accessing the network

• SIM CARD: IMSI

IMSI = International Mobile Subscriber Identity. This is a unique identifier that defines a subscriber in the wireless world, including the country and mobile network to which the subscriber belongs. It has the format MCC-MNC-MSIN. MCC = Mobile Country Code (e.g. 310 for USA); MNC = Mobile Network Code (e.g. 410 for AT&T), MSIN = sequential serial number. All signaling and messaging in GSM, UMTS and LTE networks uses the IMSI as the primary identifier of a subscriber.
The IMSI is one of the pieces of information stored on a SIM card.

Multi IMSI, is the solution which provides low cost roaming for a sim card. A sim card is configured with multiple IMSIs. Based on location any one IMSI gets active. The active IMSI is the imsi, which provides low cost access to the roaming network.

• SIM CARD: ICCID

ICCID (Integrated Circuit Card Identifier) - A SIM card contains its unique serial number (ICCID). ICCIDs are stored in the SIM cards and are also printed on the SIM card during a personalisation process. The ICCID is defined by the ITU-T recommendation E.118 as the Primary Account Number. A full ICCID is 19 or 20 characters.

The format of the ICCID is: MMCC IINN NNNN NNNN NN C x
MM = Constant (ISO 7812 Major Industry Identifier)
CC = Country Code
II = Issuer Identifier
N{12} = Account ID ("SIM number")
C = Checksum calculated from the other 19 digits using the Luhn algorithm.
x = An extra 20th digit is returned by the 'AT!ICCID?' command, but it is not officially part of the ICCID.

89 40 10 - Orange

https://www.itu.int/dms_pub/itu-t/opb/sp/T-SP-E.118-2012-PDF-E.pdf

SIM Card Info apk

MSISDN