How do I make my iPhone ring only once?

Is it possible that my phone rings only once per day?

If I understand correctly, your iPhone XR is ringing only once and then the sound notification stops whenever you get a call. This issue can be fixed by going to Settings > Face ID and Passcode. Turn off Attention Aware Features and then test the issue again.

Second, why is my phonen't ringing? There are many reasons why your Android phone doesn't ring. It's possible your phone has been accidentally silenced, switched to airplane or do not disturb mode, turned on call forwarding or an issue with a third party app.

So, how can I get my ringer back on?

To turn it on again, flip the switch located on the left side of the phone just above the volume buttons. If the red indicator is visible, it means that the ringer has been turned off. To increase the sound quality, move the switch to the off position.

What does it mean when the phone rings twice and then goes into voicemail?

If the phone rings once, then goes to voicemail, or rings only briefly it could mean that the call is blocked or that the phone has stopped receiving calls. It could be in airplane mode or turned off.