What is the 500 mb for free? Why do they offer data for free?
"They believe that internet is a right, not a privilege"
You order a device (free or not), and get 500mb free for a month. You will also get a free trial of 2gb per month, which they will bill you for if you don't cancel before the second month. They take your credit card to order, even if your device is free, and try to chap you on all sorts of fees and things.