I have had an unlimited data plan from Verizon since 2010. I know that they no longer offer new customers unlimited data but my understanding was that existing customers can keep it (if they specifically ask). During my upgrade, the associate who was working with me (Adam) asked if I wanted to remain on my 2GB data plan. I told him, no, I have an unlimited plan. And he said, "Oh, ok, I see that! You've got it." So I walked away assuming I was fine. Flash forward to a few weeks later, and I get my bill which says I have 2GB of monthly data. What? I called Verizon to find out what was going on. They told me there is an unadvertised deal where if you trade in your phone within 2 weeks (I traded mine in day of), and ask to keep your unlimited data, they will do it. After 2 weeks you're SOL. I said that I asked to keep my data AND gave up my phone, and this still hasn't been fixed. I am furious to have lost my unlimited data because of an inept Sales Associate.
I have spoken with the store manager, the district manager, and several phone customer service reps, but have only been given empty apologies ("I'm sorry you feel that way") and have been offered nothing. One phone representative told me that it was basically my fault for signing a contract. I agree that I did sign a contract agreeing to 2GB data, but that was only after my sales rep told me I would keep my data. I asked if I should expect Verizon Sales Associates to lie to me about policies during a sale and she didn't answer that.
I have been told that unlimited data is only available if you purchase a phone at retail price (or get a refurbished one from ebay or something), but I know that is not true because someone else on my family plan upgraded to a Samsung S4 for $200 AFTER I did my upgrade and was able to keep unlimited data.
Anyone who has unlimited data on Verizon, YOU CAN KEEP IT when you upgrade if you speak to the right person. If someone tells you that you can't, ask to speak to a manager or go to another store.