Dial Assist
Hello.
My dad uses the dial assist feature on his iPhone 12 so he doesn't have to put in the area code when he makes calls. A few weeks ago it stopped working even though Dial Assist is on in Settings. This bothers him because he doesn't put the area code when he is creating contacts and it takes too long to fix his contacts because he has a lot. Any ideas why this is happening. His iPhone is running iOS 15.3.1 and his cell carrier is AT&T