Just How 'Unlimited' Is Your Unlimited Data Plan?

We read the fine print.
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As competition increasingly heats up among wireless providers, offering an unlimited data plan has basically become a necessity. But just how "unlimited" are these plans actually?

We took a look at the fine print at the one line plans offered by Verizon (VZ) - Get Report , T-Mobile (TMUS) - Get Report , Sprint (S) - Get Report and AT&T (T) - Get Report . While you'll always be able to call mom (sorry), you may encounter slower speeds after a certain amount of data usage when your network gets congested. 

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Editors' pick: Originally published July 25.