=== LTE SIM Configuration ===

[[TOC(Documentation/gWide*, depth=3)]]

==== SIM Card Setting Intro ====
 * '''International Mobile Subscriber Identity (IMSI)''': 15 digit unique identifying number that is used to identify the subscriber to the service. Typically issued by the operator. IMSI consists of: 
  * MCC: Mobile Country Code - identifies geographic region of the SIM card
  * MNC: Mobile Network Code - identifies the operator 
  * MSIN: Mobile Subscriber Identifier - identifies individual subscriber
  
 Typically  [https://en.wikipedia.org/wiki/Mobile_country_code MCC and MNC] are 5, 6 or 7 digit combination leaving 10, 9 or 8 digits for the subscriber serial number. 

 * '''Authentication Algorithm''': A number of [http://www.gsma.com/aboutus/leadership/committees-and-groups/working-groups/fraud-security-group/security-algorithms standard security algorithms] are sued in cellular networks. The two that are related to SIM configuration are:
    * XOR - Mostly used for testing
    * [http://www.sharetechnote.com/html/Handbook_LTE_Authentication.html Mileanage] - Mostly used in production. Parameters stored in SIm realated to authentication are: 
      * '''Ki''': Subscriber Authentication Key (128 bit)
      * '''OP''': Operator Code - same for all SIMs from a single operator
      * '''OPc''': [http://diameter-protocol.blogspot.com/2013/06/usage-of-opopc-and-transport-key.html Derived operator code] unique for each SIM

 These keys [http://niviuk.free.fr/milenage.php should be validated] before deployment.

 * ''' Integrated Circuit Card Identifier (ICCID)''': [https://en.wikipedia.org/wiki/Subscriber_identity_module#ICCID up to 22-digit number uniquely identifying the SIM card]. Consist of:
  * Issuer identification number (IIN): Up to 7 digits with
    * Major Industry Identifier (2 digit): Hard-coded to "89" identifying ''telecommunication''
    * Country code (1-3 digit): SIM Issuer Country Code
    * Issuer Identifier (1-4 digit): SIM Issuer (operator) Code
  Valid IINs are published in [http://www.itu.int/pub/T-SP-OB.1040-2013 the Annex of the ITU Operational Bulletin].
  * Individual Account Identifier (variable length): 
  * Checksum (1 digit) : One digit [https://en.wikipedia.org/wiki/Luhn_algorithm Luhn algorithm check code].

 
 * '''Answer To Reset (ATR)''': Information message that helps reader access the card information (i.e. describes [https://www.eftlab.com.au/index.php/site-map/our-articles/169-demystifying-atr-answer-to-reset how to read the SIM card]).

NOTE: International Mobile Equipment Identity (IMEI) is not related to SIM but is rather a unique identifier of the device.
 
==== ORBIT Configuration ====

We use AAAA SIM cards with the following: