Cant answer phone

I have had Verizon prepaid for a while and over the last year I have not been able to pick up my phone when someone dials into me. It definitely is not the phone. I've gotten other people to join prepaid and there are some that have iPhones and others that have Androids and there is no Rhyme or Reason as to why people cannot pick up the phone. I'm thinking Verizon has a prepaid issue, or are being cheap about something regarding prepaid and it's gone on long enough. They are not fixing the problem. It seems to happen more on my Samsung when I have advanced calling on. Advanced calling works better where I don't lose calls when I'm driving as often. When I turn it off is when I am not able to answer incoming calls.  Verizon, as in the movie Disclosure, fix the problem.