I was already a VZW customer with 3 phones, 1 tablet, and 1 jetpack. I have the unlimited data plan which gives me 15GB high speed data on the jetpack. I wanted to switch to the FMCA plan for the MiFi and ditch the jetpack. When I tried, I got the same message that you did. When I called VZW, they did not know about the FMCA plan (it was new at the time I called) so I gave them the URL and they looked it up. What they did was sell me a WiFi for the $.01 that FMCA offers and waive the activation fee. They then added it as another device on my plan for $20 per month just like my jetpack. what I ended up with is 30GB of hotspot high speed data for $40 per month with the 2 devices. The only hassle is switching devices when the limit is reached. What has worked so far is to have the laptops on the MiFi and the smart TVs on the jetpack for streaming. So far, that has worked out.