Can’t make or receive calls on iPhone pro max
please I have IPhone 12 pro max I can’t make or receive calls. But Internet and sms all working good. I try all the steps on the Internet and still can’t make calls.
if I put the same SIM card into my iPhone 8 everything is okay.
Please can someone help me here.
Thank you
Gideon
iPhone 12 Pro Max, iOS 14