Unable to make and receive phone calls on my iPhone

Acj48-1 Said:

"Unable to make and receive phone calls on my iPhone: 12 pro max stopped making and receiving phone calls. Can’t do anything all of a sudden. Any ideas?"

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Troubleshooting Calls Not Going Through:

A. Start Here: If you can't Make or Receive Calls on your iPhone - Apple Support

B. "No Service":

Is "No Service" shown on the top-left corner of your screen? If so, go here to fix that: If you See No Service or Searching on your iPhone or iPad - Apple Support

C. Install a Cellular Update:

It might be prompting you for a cellular update to install. So, go here for that. Update your carrier settings manually on your iPhone or iPad - Apple Support

D. Update the iOS Using a Computer:

• Use my User Tip:  Update your iPhone Using a Computer - User Tip
• IMPORTANT: If you have an option to update, however, then be certain you backup your iPhone first. That way, you will have something to restore your iPhone from should anything go wrong with the update

What happens when you attempt to make a phone call? Have you contacted your carrier to inquire about active service on your iPhone?

The following guide will have some troubleshooting steps that you can try 👉 If your call fails or you can’t receive calls on your iPhone - Apple Support

Axel F.