What should I do if my iPhone doesn't support a SIM card?
My iPhone not support sim card how can solve this issue
[Re-Titled by Moderator]
iPhone 11, iOS 18
Question marked as
It means you phone is locked to a different carrier. You will need to contact that carrier and see if they will unlock it.
Note: most carriers won't unlock the phone unless you have a contract with them. If you just purchased this phone from someone, return it and get your money back unless you want to use the carrier it is locked to.
How to unlock your iPhone for use with a different carrier - Apple Support