Why are some calls not ringing on my iPhone 16 Pro Max?

I have an apple 16 Pro Max sometimes calls will come through and other times they don’t ring my phone and they just go into reset. I checked with Apple and they didn’t find anything wrong with the phone. They said to call Verizon, which ID and I am still having aI have a apple 16 Pro Max sometimes calls will come through and other times they don’t ring my phone and they just go into recent. I checked with Apple and they didn’t find anything wrong with the phone. They said to call Verizon, which ID and I am still having a problem with it

[Re-Titled by Moderator]