Why do i get a message call is restricted from any call entered on keypad on my i phone 12. Calls can be made from contacts or from calls received and returns

Hello, jerryv0918. Welcome to the Apple Support Communities. You’ve come to the right place to get help with making phone calls using your iPhone 12. 

We understand the situation and how you are noticing. That some calls are unable to connect when you dial out from the Phone app. We’re glad to see that you have already been able to start with the Apple Support article that explains how you can update your carrier settings. We have several more resources that we think will help as well. 

To continue from here, we would next suggest completing each troubleshooting suggestion listed in the following article: 

If you can't make or receive calls on your iPhone - Apple Support

It may also help to check the Screen Time settings for your device. You’ll want to be sure that your Screen Time and communication limits are set up as you would expect. You can find more information on this topic in this last article: 

Set up Screen Time for yourself on iPhone - Apple Support

We hope that this information allows you to get back to making calls normally again with your iPhone. Please reply here if you would like additional support. 

Have a great day!