Both AT&T and Verizon introduced new data plans not long ago, and we are comparing their unlimited options - AT&T's Enhanced Plus and Choice, Verizon's Above, Go and Beyond Unlimited, T-Mobile's One and One Plus, as well as Sprint's Unlimited Freedom, which is the cheapest of the bunch, with a running promo offering two or more lines for just $100.  There's been a lot of moving and shaking since US carriers went all unlimited last year. T-Mobile increased its prices, Verizon limited its "unlimited" option a bit, and AT&T enhanced the Plus and Choice plans to a level where Choice customers can be "deprioritized" at any time for paying a bit less, but don't have a blanket 3Mbps restriction anymore, plus the same goes for Verizon's cheaper option, too. One simple look at the quarterly profits of the big four US carriers, and some recent network speed tests would tell you why all of this is happening. After an initial period of amassing customers, switchers and goodwill, T-Mobile bumped its unlimited One Plus data plan with ten bucks apiece, making it pretty close to AT&T and Verizon's offerings, but not quite, as taxes and fees are included in the price with T-Mobile. When it comes to Sprint, it has been posting comparisons to showcase the running promos that make it much cheaper than the rest of the gang since, well, since it's been much cheaper than the others.