Yep, that's the kicker right there... "Unlimited" data isn't really unlimited. In most cases, if you read the fine print, it's 5GB a month (which most "normal" users wouldn't ever go over, so it's a safe gamble on Verizon's part). If you want to enable hot spot access, they charge you an extra $20 a month, which I believe is still cheaper than picking up one of the MiFis, but still $20 more than I want to pay!