What is Sim Card? A SIM card, also known as a subscriber identity module , is a smart card that stores identification information that pinpoints a smartphone to a specific mobile network. Data that SIM cards contain include user identity, location and phone number, network authorization data, personal security keys, contact lists and stored text messages. SIM cards allow a mobile user to use this data and the features that come with them. Types of Sim Card? Mini (Standard) SIM cards measure 25x15mm and are used in older and basic phones. Micro SIM cards measure 15x12mm, and are more likely to be found in phones from the 2010s and up. Nano SIM cards measure 12.3x8.8mm and are used in newer smartphones . eSIM, or embedded SIM’s, measure 6x5mm, and has the SIM card installed in the phone already. eSIM’s are activated remotely by the network carrier. #simcard #knowledge #learndigitalcomputer #computerknowledge #calls #network My Blog - https://learndigitalcomputer.blogspot.com/