iPhone 7 carrier settings and updates

My iPhone 7 with the latest update is not able to connect to my carrier. I am not able to call or text or even use data. I hope you tell me how to fix this. I’ve tried most things on the apple support website from hard reset to a reset all settings multiple times. I’ve tried taking and putting my SIM card in and out waiting the recommended time.

Pls respond when u have a chance.

thank u for reading this post and taking the time to help me, and again Thanks