What can I do if my iPhone is carrier locked?

How to unlock your iPhone for use with a different carrier - Apple Support

If that's not what you mean, please explain further. Please also understand that everyone here is a fellow user, so none of us can resolve anything. All we can do is offer suggestions.

Regards.

Contact your carrier and find out what if any unlocking policy they have…and if you have met the requirements in order for them to unlock it. That is all you can do.

If your phone is carrier-locked, only the carrier can remove the lock - if they choose to do so. Neither we or Apple can remove it for you.