Work Related

SIM Cards: What is the difference between ICCID, IMSI and IMEI numbers?

프로필

2015. 5. 22. 9:00

이웃추가

SIM Cards: What is the difference between ICCID, IMSI and IMEI numbers?

 

 

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 and UMTS 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.


ICCID = Integrated Circuit Card ID. This is the identifier of the actual SIM card itself - i.e. an identifier for the SIM chip. It is possible to change the information contained on a SIM (including the IMSI), but the identify of the SIM itself remains the same.

IMEI is short for International Mobile Equipment Identity and is a unique number given to every single mobile phone, typically found behind the battery.
IMEI numbers of cellular phones connected to a GSM network are stored in a database (EIR - Equipment Identity Register) containing all valid mobile phone equipment.
When a phone is reported stolen or is not type approved, the number is marked invalid.
 
MSISDN = Mobile Station ISDN number. This is the full phone number of a subscriber, including the national country code (e.g. 1 for US, 44 for UK, etc.). The purpose of the MSISDN is simply to allow a device to be called. A subscriber can have multiple MSISDNs (e.g. one phone number for business, one for personal calls, one for fax, etc.), but generally only one IMSI. The MSISDN does not need to be stored on the SIM card. In cases where it is stored on the SIM, the main reason is so that the user can use check to see what their own MSISDN is (in case they forget). The MSISDN is never signaled to of from the device.

  
imsi has 15 digits
iccid has between 19 and 20 digits
imei has a "unique" 15 didgit number
ICCID identified the unique phsical SIM chip.
IMSI indentified the SIM as uniuqe in International NetWork.
The SIM card may change the information including IMSI stored in itself but
ICCID can not be changed.
  
The ICCID (Integrated Circuit Card ID) is an 18- or 19-digit identification  number used to identify the SIM itself. The IMSI (International Mobile  Subscriber Identity) is a code used by the phone company to identify the SIM on  the mobile network. The IMEI (International Mobile Station Equipment Identity) is an international "Serial number" for your phone (device itself) to properly identify it on the carriers network.

 

ICCID (Integrated Circuit Card Identifier) identifies each SIM internationally. 

IMSI - International mobile Subscriber Identity is used to identify the user of a cellular network and is a unique identification associated with all cellular networks. It is stored as a 64 bit field and is sent by the phone to the network. It is also used for acquiring other details of the mobile in the HLR or as locally copied in the Visitor Location Register.

IMEI - International Mobile Station Equipment Identity is a unique number, used to identify mobile phones, as well as some satellite phones. It is usually found printed inside the battery compartment of the phone, but can also be displayed on-screen on most phones by entering *#06# on the dialpad, or alongside other system information in the settings menu on smartphones operating systems

http://www.quora.com/SIM-Cards/What-is-the-difference-between-ICCID-IMSI-and-IMEI-numbers