Call failed but Internet is working
There was no problem of calling till yesterday's night but I try to call but it keeps saying Call Failed. So, I try to use internet without wifi but it works.
I didn't soaked my iPhone.No dropping.
I've tried Airplane mode on/off , reset network settings, reboot iPhone and taking sim out /reinsert. But problem is not solved.
I wanna know how to fix the problem.
iPhone 12 Pro Max, iOS 15