Precisely. In fact I remember a story similar to this, so I Googled "did Sprint get sued for using 'unlimited' in their marketing?" Lo and behold, yes, they did. And for good reason.

It would be an understatement to say I am ashamed to work in the same industry as many of the commenters here do--commenters who are completely ignorant of antitrust law and why it exists, or for whatever reason, are completely unconcerned with the absurd market power these mega conglomerates (ab)use.