Sprint recently added a new tier to its unlimited data plans called Unlimited Premium that includes Amazon Prime, Hulu, Tidal and a 50GB LTE mobile hotspot. The new plan will cost $90 a month and be the company's most expensive plan.

This announcement falls on the heels of T-Mobile adding the Essentials unlimited data plan which, at $60 a month, is basically a cheaper version of the T-Mobile One plan without the free Netflix and international data. Both T-Mobile's Essentials plan and Sprint's Unlimited Premium plan are among the more than a dozen unlimited data plans offered by the four major US carriers. Keeping track of the ever-changing unlimited plans, prices and features can be exhausting. That's why we're here.

For over a year, the unlimited data wars between AT&T, Verizon, T-Mobile and Sprint have been heated to say the least. Each one tries to outdo the others in terms of price and how much data you actually get. On the one hand, unlimited data is like a bottomless cup of coffee at a diner: At some point you'll be cut off. On the other hand, many people don't actually need all that data -- or coffee for that matter.  

For most people, these large data plans should be more than enough. But to make sense of what you actually get, we compared the unlimited plans from AT&T, Sprint, T-Mobile and Verizon and all the fine print that came with them.