A network lock profile is acombination of one or more locks, allowing the module to enable network accessfor certain SIM cards and/or Operators. Option keeps a database of thesenetwork lock profiles which are defined per product code. It is possible to requestmultiple product codes for each individual configuration and therefore servingseveral customers.

2.  Definitions

2.1.  IMSI

TheIMSI code exists out of 15 digits and is unique in every network.

·        The first 3 digits resemble the Mobile Country Code (MCC)

·        Followed by 2 (EMEA) or 3 (NAR) digits referring to  the Mobile Network Code (MNC)

·        The last 9/10 digits represent the Mobile Station Identification Number (MSIN)

IMSI =MCC+MNC+ MSIN for EMEA countries

IMSI =MCC+MNC+ MSIN for NAR countries

By specifying the MCC and MNC digits 1-5/6 anetwork can be specified (Red and yellow in example above).

By specifying digit 6/7 to 15, subsets can bedefined (6 & 7 in blue in example above)

3.  Networklock types

§        Network Lock

§        Network Subset orSubnetwork Lock

§        Service Provide Lock

§        Corporate Lock

§        SIM Lock

3.1.  Network lock

A network lock forces yourdevice only supporting SIM cards which are locked on a predefined set ofnetworks.

This lock is defined by alist of PLMNs (MCC-MNC)

The MCC and MNC digitsuniquely identify the Network(s).

3.2.  Network subset or Subnetwork lock

This specific lock allows aspecific network subset. The MCC, MNC and MSIN will be taken into account. Thiscombination will result in a lock on a specific range of SIM cards within thespecific networks.

The firstdigits of the IMSI uniquely identify the service provider. If the IMSI isbetween the following ranges, the customer is an OPCO customer. No more then 30ranges can be specified (if more then two digits are used to define the subsetless ranges can be specified).

3.3.  Service provider lock

This is a lock on the SIMcard of the service provider within an existing network. A service provider isa company that uses the network infrastructure of another mobile operator,often known as Mobile Virtual Network Operator (MVNO).

This lock is defined bythe MCC-MNC of the network provider and a GID1 (a 1 byte field on the SIM cardbetween 0 and 255)

3.4.  Corporate lock

This is a lock on the SIMcard of the service provider in combination with a SIM of a certain type.

This lock is defined bythe MCC-MNC of the network provider and a GID1 (a 1 byte field on the SIM cardbetween 0 and 255) and a GID2  (a 1 bytefield on the SIM card between 0 and 255)

3.5.  SIM lock

This is a lock on oneparticular SIM card, and cannot be performed by Option!

This lock is defined by theIMSI which uniquely identifies the target SIM card. There is a possibility touse Auto-lock, which writes the IMSI on the first time use!

This lock will NOT beincluded into the database. The IMSI will be linked to the serial number of thedevice in production. For more information please contact your technicalcontact within Option.