My mom's phone is iPhone 6S+. Most of the time, facebook messenger doesn't ring. nstead she will receive a notification she missed a call. I also noticed, it takes me a lot of missed calls to make it ring. I checked "Do Not Disturb," it's off. I checked the settings if it is allowed to notify and run in the background, all is good. Yet, the problem exist.
Who knows how to fix it?
Who knows how to fix it?
