My iPhone 13 Pro does not ring consistently, I’ve checked all the settings, I’ve called Verizon Customer service multiple times - nothing works. There is no pattern to the missed calls, the phone simply does not register the call. When someone calls the phone does not ring and the person is directed to my voicemail. If the person doesn’t leave a message there is no way I would have known they called. I’ve seen posts about this issue with Verizon dating back to 2020. This is clearly a known issue with Verizon and there is no resolution.