SIM Full Form | What is full form of SIM


SIM Full Form | What is the full form of SIM

SIM full form? What is the complete form of a SIM?  full name of the SIM? What does a SIM mean and what is the Use of a Sim? Many of these questions will come to mind often, in this post we will know the answers to all these questions, So we will provide you full information about let us know what the SIM complete form so Let first know what is SIM:-



SIM, which is necessary for every mobile in today’s time, by this we talk from one network to another. If there was no SIM, we would not have been able to talk today. Basically SIM is an integrated circuit that securely stores the international identity of the mobile subscriber (IMSI). It is a portable memory chip that allows you to make phone calls or send text messages worldwide where the subscriber network is available. SIM is a smart card that stores data for subscribers of GSM cell phones.

SIM Full form:-

  Stands For  Subscriber

I     Stands For  Identity OR  Identification

 Stands For  Module

The  main information does a SIM card store:

The main information stored by the SIM card includes data such as:-

  • User identity.
  • Telephone number.
  • User Location.
  • Network authorization data.
  • Personal security keys.
  • User Address book.
  • Stored text messages.
  • International Mobile Subscriber Identity (IMSI)
  • Unique serial number (ICCID)
  • Encryption information.
  • security information
  • Contain some temporary information of Local Network

It also provides security features that include authentication and encryption to protect your data and avoid listening to it.


The first SIM card was invented in 1991 by a German company called Geek and Devrient (Giesecke & Devrient). The SIM was initially specified by the European Telecommunication Standards Institute.

Giesecke & Devrient, a smart card manufacturer in Munich, is based in Germany. First, the GSM service was introduced by launching SIM cards in several European countries. At that time, the GSM protocol was implemented in Europe.Size Of SIM:-

When the first sim was invented, the SIM was almost the size of a credit card. But the newest standard of a SIM contains a size of 15 mm by 12 mm. Today, some smartphones use micro and nano SIM cards of different sizes, so the size of the SIM card may vary from one service provider to another slightly.

Types of SIM:

There are two types of SIMs used in mobile.




GSM’s full form is Global System for Mobile Communication. Global System for Mobile Communication mobile phones are divided into a phone and a removable SIM (Subscriber Identity Module) card. SIM contains all the information about the user of it. You can fix this removable SIM on another phone to activate it using the same identity. GSM SIMs are used in all types of mobile phones ”Nowadays, most GSM SIMs are being used.


CDMA’s full form is Code Division Multiple Access. In CDMA, You get a CDMA SIM only with a mobile phone, this SIM cannot be taken out of a mobile phone, the company that has a mobile phone is a SIM of the same company. All information about the user and the account is stored in the internal memory of the device or phone.”CDMA SIM can be used in some mobiles”

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So folks, today we read about what SIM is, what is SIM Full Form I also told you many important things related to SIM, SIM types, and we are trying to cover the whole topic related to SIM, I hope you understand everything answer what you are looking for and clears all your doubts related to SIM. I hope you liked this post.  kindly share it.

About Vivek Choudhary 70 Articles
I am Content Writer/Blogger who loves researching new stuff, playing games, travelling, and music. You can find me on Facebook, Twitter, and Linkedin.

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