A SIM card number is also called an ICCID. ICCID stands for Integrated Circuit Card Identifier. It's a unique number. It identifies your specific SIM card. Think of it like a serial number for your SIM. This number is different from your phone number. Your phone number identifies your service. The ICCID identifies the physical card. It's important for your copyright. They use it to ma... b2breviews.club