What is the full form of SIM?
SIM Full Form is Subscriber Identity Module or Subscriber Identification Module. SIM is a portable chip and integrated circuit that securely stores the international mobile subscriber identity (IMSI). In this article, we talk about what the full form of SIM is and some functions of the sim. It is a smart memory card that allows us to make international phone calls where the user’s contact network remains constant.
Read Other Full Forms
SIM cards are typically utilized on GSM networks operated and controlled by smartphones. It is portable and can be used with any mobile device that supports this functionality.
History
The first SIM card was created in 1991 by Devrient and Giesecke, a Munich-based smart card manufacturer. European Telecommunication Standards Institute initially acknowledged and declared the SIM.
The function of SIM Card
The SIM card stores a large amount of information transmits essential data to the customer’s network, and stores some of their private and personal information as well. The list of stored information by SIM is
- Address details
- Text messages
- Individual security keys
- a telephone number
- Information concerning network authorization.
- Other data.
Several essential data carried by SIM are detailed below.
- IMSI (International Mobile Subscriber Identity)
- Unique serial number
- Brief information regarding the local network.
Size of The SIM
Initially, the size of the SIM card was comparable to that of a credit card, but the size of the SIM card that was eventually disclosed is 15 mm by 12 mm. Some smartphones now employ nano and micro-SIM chips of distinct sizes.
