Unlimited smartphone data is back! Roll out the barrels, re-download Netflix, and disable all those "Wi-Fi only" settings options, happy days are here again. But don't throw away your data meter just yet: the new batch of unlimited data plans from American carriers isn't what it used to be. A lack of limits now comes with an asterisk, like your favorite sports star "enhancing" his performance. So the question is no longer, "which mobile unlimited plan is the best?" Instead, it's "which carrier is going to put the least amount of petty restrictions on my so-called unlimited data?"