Hi susanfromsugarland,
Thanks for using Apple Support Communities. It sounds like you’re having trouble with your iPhone not ringing. I’m happy to help.
To start, make sure you’re running the latest iOS version:
Update your iPhone, iPad, or iPod touch - Apple Support
Then, make sure you don’t have Do Not Disturb or Silence Unknown Callers enabled:
Detect and block spam phone calls - Apple Support
Use Do Not Disturb on your iPhone, iPad, and iPod touch - Apple Support
If the above does not resolve your issue, I suggest reinstalling iOS. While this shouldn’t remove any information from your iPhone, it’s a good idea to have a backup handy:
How to back up your iPhone, iPad, and iPod touch - Apple Support
To reinstall iOS, follow the steps in the article below, under the section labeled “Put your device in recovery mode and set it up again”:
If you can't update or restore your iPhone, iPad, or iPod touch - Apple Support
Best Regards.