This problem only occurs on WiFi calling, and it just started happening after letting my niece use my phone. Basically, when calling someone, my phone does not make a ringing noise. Rather, it is dead silent until the person answers. I know this should be able to be fixed via wifi calling settings, but when I go to calling settings I don't see anything that would help. Is there a way I can reset my wifi settings to default? This is rather annoying and I want the ringing back, oddly.