iPhone X won't ring on incoming calls

A user with a Sprint PCS iPhone X running ios version 11.1.1 (15B150) that has Google voice installed on it only slightly vibrates during incoming calls to either its phone number or to the google Voice number.

I have checked the obvious settings and everything seems to be set correctly.

The Do Not Disturb feature is turned off.

What needs to be done to change this so that the iPhone X will ring during incoming calls.
IT GuyNetwork EngineerAsked:
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JohnBusiness Consultant (Owner)Commented:
I am not sure about the X. There is normally a physical Mute switch on an iPhone. Is this switch OFF ?
RaminTechnical AdvisorCommented:
1.Open the Settings app.
2.Tap on Sounds & Haptics.
3.Drag the slider under Ringer And Alerts all the way to the right to turn up the ringer volume all the way.

Turn on ringing for incoming calls in Hangouts:

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Jackie ManIT ManagerCommented:
Try to remove Google Voice app, restart iPhone and see whether your iPhone will ring.

If you read the reviews of Google Voice app, you will see the app is not completely compatible with iOS 11.
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JohnBusiness Consultant (Owner)Commented:
The iPhone X has a physical mute switch - I checked this. Make sure it is not showing orange.
Gerwin Jansen, EE MVETopic Advisor Commented:
Why not use Siri?
Kyle SantosQuality AssuranceCommented:
I looked this app up in the app store on my iPhone.  There are quite a few recent reviews in December and November that are complaining a lot about the app and how the performance has degraded from iOS 10 to iOS 11.  

I installed the app and sent myself a test call.  It rang and I heard it ring.  I did a test again turning on the switch to silence the phone.  It called and it buzzed, but no ringing sounds came in (as I would expect).  Mind you, I am still on iOS 10.3.3 because I've been waiting to go to iOS 11 for my own personal reasons (iOS 11 is still buggy so I don't mind waiting for a while).

Maybe your user accidentally turned off notifications?
Go to Settings > Google Voice > Notifications
Are notifications on?
Are Sounds on?

If there is still an issue, you might just have to delete the app and reinstall and try running a test again.  Let us know what happens.
IT GuyNetwork EngineerAuthor Commented:
Solved this issue using both Ramin's and John's solutions.
JohnBusiness Consultant (Owner)Commented:
Thanks for the update and I was happy to help.
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