What is the Full Form of SIM?

SIM full form is Subscriber Identity Module. It is also known as the Subscriber Identification Module. The portable chip with a built-in circuit on which International Mobile Subscriber Identity (IMSI) is stored, is identified as SIM. Through a SIM card, people all around the world are able to contact and call each other. As a beginning of technological advancement, it is also responsible for storing information that helps the transaction of text messages. Do note that even though a mobile phone can function without a SIM card, it cannot connect to a cellular network without one. 

What does a SIM Card Contain?

A SIM stores a mountain of useful information that serves to assist the SIM card holder. Listed below are the items that a SIM card contains:

• Address details
• Data regarding network authorization.
• Text messages
• Phone number
• Personal security keys
• Other related information

Also Read – What is the Full Form of IMEI?

The function of SIM Card

The SIM card is responsible for storing and transmitting a significant amount of data between the network and the user’s device. 

• This data includes personal information such as address details, text messages, security keys, and network authorization data.
• In addition, the SIM card also carries important information like the International Mobile Subscriber Identity (IMSI), a unique serial number, security information and details about the local network.

Also Read – What is the Full Form of MNP?

5 Facts About a SIM Card 

As we know by now, SIM full form is Subscriber Identity Module. To further expand on SIM cards, we share the below facts for your information. 

1. In 1991, Munich is the location where the first SIM card was invented and manufactured. 
2. The sim cards hold unique security keys that help service providers with customer authentication. 
3. In 2010, the smaller micro SIM was introduced. And the even smaller nano SIM was then introduced in 2012. 
4. Globally, 5.4 billion SIM cards were manufactured in 2016, according to the International Card Manufacturers Association (ICMA). 
5. Generally, on average, a SIM card can store 64Kb for text messages, subscriber info, and contact details.

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