SIM FULL FORM

Full Form of SIM : Subscriber Identity Module or Subscriber Identification Module

What is the full form of SIM?

No:1. The full form of SIM is the Subscriber Identity Module or Subscriber Identification Module.
No:2. SIM is a portable chip and built-in circuit that stores the international mobile subscriber identity (IMSI) in a strong, safe way.
No:3. It is a smart memory card that enables us to establish a phone call across the globe where the contact network of the user is constant.
No:4. SIM is generally used on smartphone-operated and controlled GSM networks.
No:5. It is movable and can be used by a user with any mobile device that supports this.

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A Brief History of SIM

No:1. The first SIM card was established in 1991 by Devrient and Munich smart-card maker Giesecke.
No:2. The SIM was initially recognized and declared by the European Telecommunication Standards Institute.

Function of SIM Card

No:1. SIM card stores a lot of information and also brings essential pieces of data back and forth to the network of customers and holds some of their private and personal data as well.
No:2. The list of information stored by SIM is :
1). Address details
2). Text messages
3). Personal security keys
4). Phone number
5). Data regarding network authorization.
6). Other data.

A few crucial data carried by SIM are listed below :

No:1. IMSI (International Mobile Subscriber Identity)
No:2. Unique serial number
No:3. Security information
No:4. Brief details related to the local network.

Size of The SIM

No:1. When SIM was first produced in the beginning the size of nearly the credit card, but the later size of the SIM eventually disclosed gives a capacity of 15 mm by 12 mm.
No:2. Some smartphones now use distinct sizes of nano and micro -SIM chips.
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