Why Ringer indicator is red with a slash
My iPhone will not ring. When I try to turn up the ringer volume I see a red bell with a slash through it even though it also shows the volume going up or down depending on which button I press. I’m not in do not disturb mode and I have checked sounds and haptics. I can hear music so I know the speaker is good. and if I slide the ringer and alerts button I hear the phone ringer volume change, but it doesn’t ring when a call comes in.