This may be a little bit late but maybe this will help. I upgraded to the GS4 last month (subsidized through VZW) and accepted that I would lose my unlimited data. But I wasn't happy that they put the data limit on me for the current billing cycle so I called VZW to see if I could get a pass until the next billing cycle. But instead the CSR told me the exact same thing that the OP mentioned and switched my data back to unlimited. I've been waiting for the next billing cycle to see if I still had unlimited data before posting anything. New cycle and still showing unlimited!
What the CSR told me was that if you buy your phone in store they have to switch you to a capped data plan, but you can call and switch it back within 14 days. She mentioned something about being able to keep your unlimited data without switching it back and forth if you bought the phone over the phone (if that makes sense). I am on a shared plan with someone else that never gave up their unlimited data so I don't know if that has anything to do with it or not, but she didn't mention anything about it being possible due to that fact. I was thinking about starting a new thread with this topic.
Whoa, that's pretty cool! I wonder if anyone else has done the same. Would be good to hear from them.
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