Incoming calls not ringing

Some things to check:

The ring/silent switch on the left side of the phone. See: How to put your iPhone on vibrate, ring, or silent mode - Apple Support

Settings > Phone > Silence Unknown Callers: Detect and block spam phone calls - Apple Support

Do Not Disturb: Use Do Not Disturb on your iPhone, iPad, and iPod touch - Apple Support

If none of the above, also try restarting: Restart your iPhone - Apple Support

I've checked all of those things, and it's still not working. IF it rings, it rings once then automatically sends the caller to voicemail before I can even answer the phone. It worked fine, until yesterday (April 6, 2022) so I don't know what's changed.

I’m having same issue