I am a new/returning VZW customer and got my Rezound for a penny on Amazon Wireless.
Tried this yesterday, 12/04. Worked on the fourth try. First three reps said I must have had the unlimited plan prior to July 2011. One even said I can't get unlimited data on the MHS at all..."The max is 2GB".
The fourth rep was great, saying that "...the system they use to add/delete options is way too complicated". But then she said "Oh wait. Lemme try something here..." She then said she removed my $30 5gig data plan in order to add the $29.99 MHS plan and Lo and Behold, there was the Unlimited Data. She said "Well, I don't think you're supposed to have it as a new customer, but if it lets me do it, who am I to argue?" She asked me to check with MyVerizon while she was still on the phone "...to see if everything looks 'correc't with my account". As soon as I saw Unlimited Data, I was like, "Absolutely! Thank you, Bye!!"
PS...Learned my lesson by NOT mentioning anything about Unlimited Data on the third and fourth try.
Merry Christmas!!