In my opinion, all of these so called "unlimited" third party resellers are doing something shady. It might not be illegal but the real providers figure out what these resellers are doing and either cancel their ability to sell the plans or make it too expensive. Then the resellers find some other avenue or loophole to continue their business. Then it's Rinse and Repeat. If AT&T, T-Mobile, Sprint and Verizon wanted to provide truly unlimited data with no caps, no throttling, no anything, at a reasonable price, they would do it themselves. They don't need resellers to sell their product.