https://consumerist.com/2017/10/11/possible-sprint-t-mobile-merger-could-face-doj-antitrust-opposition/

Though the romance rumor mill is still claiming that Sprint and T-Mobile are hoping to announce their engagement in the weeks to come, and it’s highly unlikely that the pro-industry FCC will do anything to slow these crazy kids from merging, the wireless wedding could be spoiled by the anti-trust wet blankets at the Justice Department.

A combination of the third and fourth-largest wireless providers in the U.S. would result in three mega carriers, each controlling in excess of 120 million customers. The next-largest provider would be U.S. Cellular, which currently has fewer than 5 million wireless customers and only provides service in about half the states.