Terms

Tuesday, February 16, 2016

1)  WLAN or Wireless Local Area Network.
2)  SIM card: Subscriber Identity Module.  It identifies your phone.  Pohne knows what network to use and your company knows who to bill for the communication.
3)  Integrated Circuit Card Identifier.



from Quora

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.
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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

On Apple iPhone - these codes can be searched using this link -
iOS: How to find the serial number, IMEI, MEID, CDN, and ICCID number

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ICCID (Integrated Circuit Card Identifier) identifies each SIM internationally. It is inscribed on the back of the SIM Card. A full ICCID is 19 or 20 characters. ICCID can be thought of as the serial number of the SIM Card. It is also considered as Issuers Identification Number. In layman's terms, it is sim cards ID number.


IMSI is unique International Mobile subscriber Indetity. It is stored inside the SIM.  It consists of three part.
  1. Mobile Country Code (MCC) : First 3 digits of IMSI gives you MCC.
  2. Mobile Network Code (MNC) : Next 2 or 3 digits give you this info.
  3. Mobile Station ID (MSID) : Rest of the digits. Gives away the network you are using like IS-95, TDMA , GSM etc.


    Mobile network code (MNC) is used in combination with a mobile country code(MCC) (also known as a "MCC / MNC tuple") to uniquely identify a mobile phone operator/carrier.
     
IMEI (International Mobile Equipment Identity) number of a mobile phone is a 15 digit number unique to a mobile handset. Just key in *#06# on your mobile phone and it will display its IMEI number in most phones.

IMEI is a number, usually unique,to identify 3GPP (i.e., GSM, UMTS and LTE). The IMEI number is used by a GSM network to identify valid devices and therefore can be used for stopping a stolen phone from accessing that network. For example, if a mobile phone is stolen, the owner can call his or her network provider and instruct them to "blacklist" the phone using its IMEI number. This renders the phone useless on that network and sometimes other networks too, whether or not the phone's SIM is changed.

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ICCID = Integrated Circuit Card ID. By this we can identify each SIM internationally. You can see it inscribed on the sim, and it is something near 20 digits. It is possible to change the information contained on a SIM (including the IMSI), but the identify of the SIM itself remains the same.
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 is one of the pieces of information stored on a SIM card. It have a sequence of MCC-MNC-MSIN. (MCC-Mobile Country Code: first three digits.MNC-Mobile Network Code: Next 2 or 3 digits. MSID-Mobile Station ID: Rest of the digits.)
IMEI = International Mobile Equipment Identity. It is a unique number given to every single mobile phone, typically found behind the battery.
Out of the given three, ICCID and IMEI numbers cannot be changed.

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