SIM full form | Meaning of SIM

What is the SIM full form? Subscriber Identity / Identification Module is the meaning of SIM Card. It is a plastic / wood card or a chip which can support telecom network as well as it can store some data such as - Contact, Short Messages, Network Specific Information. This is really nice and portable chip. Because any user can change his/her device without loosing their network ans data. In 1991, First SIM card was first designed by Munich smart-card maker Giesecke & Devrient, who sold the first 300 SIM cards. Types of SIM Card

• Mini
• Micro
• Nano
• Embedded

Size First card was designed as an ATM card or Master card. But it point to fit in mobile device that's the reason SIM's Size was removed. But now it is available in many size. It covering mobile technologies, such as 2G, 3G and now 4G too. If you have any SIM full form which is not listed above so you can help us by comment.