I just got a new SIM card for my Apple iPhone, and it's showing 'SIM not supported.' How can I resolve this issue?

If you're experiencing SIM card problems on your iPhone, there are a few steps you can try before contacting Apple Support.
• Restarting your iPhone is often the first and easiest troubleshooting step. Hold the power button until the slider appears, then slide it to turn off your iPhone to restart.
• Verify and update carrier settings:
• Contact carrier for eSIM issues: If your iPhone uses an eSIM, make sure your carrier activated it. Contact your wireless carrier's customer support for eSIM verification.
• Reinstall Physical SIM Card: Carefully follow these steps for devices with physical SIM cards:
• Empty your iPhone's SIM card tray. Replace the SIM card carefully, making sure it fits snugly in the tray.
• Try Another SIM: If the problem persists, try a different SIM card (if available). You can buy an extra SIM card at your wireless carrier's store. Ask for help testing your iPhone with another SIM card. This step can determine whether the issue is with your SIM card or device.
• Call Apple Support: If none of the above steps fix the "SIM not supported" issue, contact Apple support. They offer advanced troubleshooting, advice, and assistance tailored to your situation.