The data tiered plans are absolute crap, it's just another way for vzw to get more money from their customers, they put it under the guise of protecting the network from users who overuse. or some crap. I remember when they switched MB usage from minutes to actual per MB, I was grandfathered in on that, but my wife HAD to upgrade her phone without me there and they refused to put me back on the plan when I found out two months later (I was away at training at the time) So simply pay attention when you upgrade and go ahead and ask/argue about getting unlimited if you are new, who know they might work with you.