Plss help me how to fix my sim card not supported:(

Your phone is locked to a carrier. You need to unlock it from that carrier before you can use it with a new carrier.

https://support.apple.com/en-us/HT201328

Sim not supported but it the same carrier just new sim

My SIM card not supported

Your phone is locked to a different carrier. You need to contact the carrier it is locked to and ask them to unlock it before you can use the SIM from your new carrier.

Please help to fix my sim not saport

How to do it?

What is the error message that you get? Contact your carrier for help with this too.