Description

Sim Card Information

SIM CARD INFORMATION is a powerful tool to get additionaldetails about your network provider. It also will be useful forprofessional roaming telecommunication engineers while the IREG andTADIG testing to check the billability of the calls.
SIM cards store network-specific information used to authenticateand identify subscribers on the network. The most important ofthese are the ICCID, IMSI, Authentication Key (Ki), Local AreaIdentity (LAI) and Operator-Specific Emergency Number. (Refer toGSM 11.11)
SIM cards can come in at least two capacity types: 32 KB and 64 KB.Both allow a maximum of 250 contacts to be stored on the SIM, butwhile the 32 KB has room for 33 Mobile Network Codes (MNCs) or"network identifiers", the 64 KB version has room for 80 MNCs. Thisis used by network operators to store information on preferrednetworks, mostly used when the SIM is not in its home market but isroaming. The network operator that issued the SIM card can use thisto have a SIM card connect to a preferred network in order to makeuse of the best price and/or quality network instead of having topay the network operator that the SIM card 'saw' first. This doesnot mean that a SIM card can only connect to a maximum of 33 or 80networks, but this means that the SIM card issuer can only specifyup to that number of preferred networks, if a SIM is outside thesepreferred networks it will use the first or best availablenetwork.