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