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Business Insider recently compared the unlimited-data plans offered by Verizon, AT&T, T-Mobile, and Sprint.

Each plan has its pros and cons, but we recommend T-Mobile's One plan as the best overall value.

T-Mobile is the only carrier to bundle taxes and fees into the prices of its plans, and its non-throttled data cap is significantly higher than its competition. Prices start at $70 a month for one line up to $140 month for four lines.

Before making the switch or signing up, do some research into which wireless service best covers your area, since any plan is worthless without good service.

Last year, the four major US wireless carriers all decided to bring back an unlimited-data plan, giving smartphone owners the choice to stream, binge-watch, and surf the web without the fear of penalty. Business Insider recently revisited the plans, and while none is perfect, T-Mobile's ONE plan looks like the best overall deal.

The most 'unlimited'-data plan

Although they're called unlimited plans, the four carriers all put limits on the amount of high-speed data you can use without being throttled. Some of the lower-end unlimited plans don't even let you hit a cap before slowing your speeds, deprioritizing your data because of network congestion, but you won't have to worry about either on T-Mobile.

The carrier offers a 50GB cap on high-speed data, which is more than most people can use in a month without constantly streaming video. Speaking of video, one of the downsides of T-Mobile's ONE plan is it lets you stream in only 480P, not HD.

Streaming HD video on the go is tricky

The only carrier that lets you stream 1080P video as part of an unlimited plan is Sprint. AT&T and Verizon reduce video quality while streaming down to 720P. You can choose to pay an extra $10 on T-Mobile for its ONE Plus plan, which does let you stream video in high definition. The final word on video is that many carriers offer free streaming accounts as part of their plan.

T-Mobile plans with two or more lines are eligible for free Netflix, while AT&T offers free HBO, and Sprint customers can get a free Hulu account. If you already rely on one of these services, getting a free subscription from your carrier is a major benefit.

A pricing structure you can actually understand

Another reason to go with T-Mobile's plan is its simplified pricing; the other three carriers present their plans' base price, without including taxes and fees, which vary from region to region. T-Mobile's plans include taxes and fees in their price, so what you see is what you pay.

T-Mobile has further simplified things by offering one plan (as its name suggests), instead of having a pair of unlimited data options with different trade-offs like Verizon and AT&T.

Simplified billing and a high data cap are both strong reasons to go with T-Mobile's ONE plan, but you shouldn't sign up without knowing another potential caveat.

No plan is perfect, but T-Mobile's has the fewest glaring faults

If you want to use your phone as a hotspot (letting devices like a laptop or tablet connect to it to use its data), T-Mobile's plan lets those devices use the internet only at 3G speeds. AT&T and Sprint both offer 10GB of full, LTE hotspot data, while Verizon offers 15GB on its higher-end unlimited plans.

While no phone plan is truly "unlimited," T-Mobile offers the highest data cap and most simplified pricing. Upgrading to its ONE Plus plan offers even more perks (and fewer restrictions) but the regular ONE plan is no slouch.

I'll mention again that you should do your research to find out which carriers offer the best coverage in your area — but if T-Mobile is available, you should strongly consider its unlimited-data plan.