Sim Cards - Explanation

What is a SIM card and how many different kinds are there? First off, SIM stands for subscriber identity module or subscriber identification module. These modules are small memory cards that contain information for a mobile network. To learn more, check out the image below.

SIM Card Type Physical Size Year of Introduction Generation Name (Form Factor) Terminology
SIM - Subscriber Identity Module ICCID
Full Size 85.6mm × 53.98mm × 0.76 mm 1991 FF1 IMSI
Standard / Mini 25mm x 15mm x 0.76mm 1996 FF2 IMEI
Micro 15mm x 12mm x 0.76mm 2003 FF3 MSISDN
Nano 12.3mm × 8.8mm × 0.67mm 2012 FF4 KI AND ADM KEYS
eSim (Non-Removable) 6mm x 5mm x <1mm 2016 eUICCID (embedded Universal Integrated Circuit Card) OPC
ICCID (Integrated Circuit Card Identifier) This is a number located on a SIM card itself that acts as a personal identifier


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Sim card

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