Follow the steps below to retrieve your SIM card number (ICCID) from the iPhone.
Starting from the home screen:
- Tap “Settings.”
- Tap “General.”
- Tap “About.”
- The entry titled ICCID is your SIM card number.
If your iPhone will not power on, you can eject the side SIM tray using a SIM tool or a push pin to get your SIM card number (ICCID). Simply push the pin or tool into the small hole next to the tray and it should eject, revealing the SIM.
You can check your phone's compatibility here.