Don’t ring same app
My iPhone won’t ring when receiving calls from Viber , messenger, what’s app, and signal app. It can’t display a call coming in on the screen and there’s no sound. However it will ring if the apps is open . I have checked all the settings. Do not disturb is turned off. Allow calls is set to everyone. Sound is turned on for phone calls and volume is all the way up. Mute is turned off. Notification settings are turned on for each app. I have tried a simple reset of the iPhone. I do not know what else to try. I am missing all of my calls.
iPhone X, iOS 14