Your SIM card number, also called the ICCID (Integrated Circuit Card Identifier), is imprinted on the card and can be found in different locations based on the type of smartphone you have. There are 2 different ways to locate your SIM number or ICCID:

1. Display the SIM number in the Settings screen: Go to Settings > General> About. Then scroll down and locate the ICCID number.
   
2. Or, eject the SIM card: Insert a paper clip or a SIM-eject tool into the hole beside the tray and eject the tray then remove the SIM card and locate the SIM number on the card.