SIM card changed not supported by my carrier
What do I do to change this I have paid for my service for the month and can not use it because it’s saying my phone doesn’t take the SIM card so y would it let me set it up and take the number
First off this is a user-to-user technical support site operated by Apple. The volunteers here didn't do anything to you.
Are you getting a longer message that says this is not a hardware error? If you your phone is carrier locked, you will have to contact the carrier holding the lock and see what their unlock policy is and if you qualify.