Unable to make or receive any type of calls
My phone crashed yesterday and since then I have been unable to make or receive any calls. I have tried normal phone calls, wifi calling, what's app, messenger, FaceTime - both audio and video. I get call failed every time. If my phone rings I answer it and the time on call comes up but nothing there.
So far I have tried to reset network settings, taken out my sim card and cleaned, I have even restored my iPhone. But the problem is still happening.
Any help on how to fix this would be great.
iPhone 7, 12