Hi. Here's my take based on my experience. First, as we all know, ALL of the reps either at the actual Corp. store or if you call, seem to have a different answer. That is the biggest problem. Keep all emails and paper statements if you have them.
Anyway, from what I was told, the Unlimited Hot Spot was only for an online promotion for the Thunderbolt only, which I bought on July 6th, 2011. Long story, so won't bore you! Because of bad connection problems with the T-Bolt, I was sent an iPhone. Low and behold, my Unlimited plan had changed to only 2GB for the MHS, although my phone data plan stayed at Unlimited.
I called and the guy was very curt and said there was NEVER an Unlimited plan at anytime on Verizon for the MHS. He said he had a T-Bolt and he should know. After many calls/emails, a nice lady rep. did find it in the system. Luckily I had my contract and bill that showed Unlimited for the MHS. It is still very confusing as I would have to go back to the T-Bolt to get the Unlimited MHS again. I purchased the Nexus and also selected the upgrade when I tried to access it from my phone for $30.00. Online, it still just shows MHS(it does not show any type of limit like some of the options show).
So, I am hoping that this is also the Unlimited plan for 4G(new tower next to my house for 7 months now but still not put into to operation!). Please keep all documents or print them up so you have actual proof. Since the answers can vary depending on who you talk to, having good documentation is your only way to protect yourself.
And this is the SHORT version of what happened! I am sure a lot of you can relate as I can't be the only one who has had problems and not just with Verizon.
Happy New Years-2012!