We have had a family plan with Verizon for a year with absolutely no problems.  Well, my phone stopped working and I got a new one last week.  Now 3 days in only about half of texts are being received.  My husband is in on our plan is not receiving any of my texts.  This is a huge problem and I have no idea what is going on.  So, it certainly has nothing to do with people that are not verizon customers.