Not receiving calls

Hello,

Check whether ‘Silence Unknown Callers’ is on. You can do this by going to Settings > Phone > Silence Unknown Callers.

Thanks,

EpicX

I have the same problem and silence unknown callers is not turned on. Also the caller is in my contact list.

Try following the steps on this link:

https://support.apple.com/en-gb/HT204027

Thanks