What is the Full Form of SIM?

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SIM Full Name is Subscriber Identity Module. It is an integrated circuit that aims to secure the international mobile customer identification number and its related key, which is used to identify and certify customers on mobile telephony devices. It is also possible to store contact information on many SIM cards. SIM cards are always used on phones for CDMA phones, they are only required for new LTE enabled handsets. Sim card can also be used in satellite phone.
A SIM card includes its unique serial number, International Mobile Customer Identification (IMSI) number, security certification and saifing information, temporary information related to local network, list of user services and two passwords: one for general use A private unblocking code (PUK) for personal identification number, and PIN unlocking.
SIM Circuit Universal Integrated Circuit Card is part of the work of physical smart card, which usually comes with PVC embedded contact and semiconductor. "SIM cards" are transferable between different mobile devices. The first UCC was the size of smart card credit and bank card; Over the years, sizes were reduced several times, usually keeping electrical connections in common, so that a large card is cut in a small size.

A SIM Card can be used to hold & provide the following information :-
  • Phone number
  • address book
  • network authorization data
  • text messages
  • personal security keys
  • other data

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