This is simply not true.  I have this exact model on my RV and it works and has worked for about 3 years.  Advice to the OP, return the thing, stay away from it.  I have had to get a new sim card from Verizon about 4 times, at a cost of $15 becuase.  I would get an error message from the winegard saying sim not found.  My friend bought one recently and Verizon told her the exact same thing the employee told you.  She returned hers.  Guess what, a few days later my sim card died again, I went to the store and they gave me a new sim card for the unit ands activated it!  I am not sure how Verizon cannot even keep their story straight between the company.  They don't support the product yet many people have them and use Verizon, so they actually do support them its just some employees say they don't becuase they are unfamiliar with the product I guess, I have no idea?  Good Luck!