SIM Full Form | What is Full Form of the SIM — Gupshups

SIM Full Form | What is Full Form of the SIM

SIM full form is Subscriber Identification Module or Subscriber Identity Module.

When the first SIM card was invented, it was roughly the size of a credit card.

But the latest standard of a SIM has a size of 15 mm by 12 mm.

Nowadays, some smartphones use micro and Nano-SIM cards which is very small in size.

SIM Full Form

Full Form of SIM:

In this post, along with the full form of SIM, we had also discussed SIM types, who invented the SIM, What is SIM Full Form, etc.

SIM Full Form in Telecom and Other Information:

Who invented the SIM Card?

The first SIM card was created in 1991 by Munich’s smart card maker Giesecke and Devirant.

They sold the initial 300 SIM cards to the Finnish remote system administrator Radiolinja.

SIM Card was recognized first time by European Telecommunications Standards Institute.


What is a SIM card and what does it do?

A SIM(full form Subscriber Identity Module or Subscriber Identification Module) is an integrated circuit intended to securely store International Mobile Customer Identification (IMSI).

SIM Data includes User ID, location, Phone Numbers, Contact Lists and, Messages and Network Authorization Data.

Security features include authentication and encryption to protect data and prevent eavesdropping.

If there is no SIM for any company in your phone, then you cannot benefit the facility like calls and messages.

SIM Card Parts and Functions:

SIM Full Form
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The size of the SIM( full form Subscriber Identity Module ) is very small as a memory card but it has a chip inside which the only mobile can read.

You will get the SIM at any telecom store, you just have to have an Aadhar card and your age should also be above 18 years.

Many times when mobile is theft, our SIM is also stolen, in such a situation, you should stop that SIM as soon as possible.

The SIM card looks like a piece of plastic, but this plastic piece has an integrated chip that can read mobile only.

Every SIM card has unique information, phone number and data store for every network.

Helps in using communication service.

If you do not have a SIM card, then you cannot use messages, calls and internet on your phone.

We also have many telecom operators in India, all of them provide SIM cards to their customers such as Airtel, Vodafone, Idea, Reliance Jio, etc.

In the SIM card, we can store 250 contacts saved, the messages are also saved, along with some important information.

The first SIM card that was made was the same size as the credit card, but gradually it got reduced in size and today mini and micro SIM cards have become very small.

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What is the difference between GSM and CDMA SIM?

 See, when we talk about SIM (full form Subscriber Identity Module), two names first come to our mind, GSM and CDMA, but we do not know the difference between them and how it is different from each other.

What is GSM network mean?

GSM stands for the Global System for Mobile Communications.

GSM, you can use it, in any mobile.

Suppose your phone battery drained, then you can use that SIM Card in other mobiles.

What is CDMA network mean?

CDMA stands for Code Division Multiple Access

CDMA SIM works only in CDMA phones.

You cannot remove the SIM from phones.

The SIM (full form Subscriber Identity Module) and mobile belong to the same company.

For example, in Reliance you get the option of CDMA.

Both will be from Reliance Company, you cannot put SIM of any other company in it.

Nowadays GSM is mostly used.

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Conclusion for SIM Full Form:

So friends, in this post today, we learned what the Full Form of SIM.

In this post, we discussed detailed information about the SIM, types of SIM, why SIM Card is necessary.

I hope you like this post about SIM Full Form, if you got to know something new, then share this post.


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