A $26 billion merger between T-Mobile and Sprint would unite the cell-phone carriers that have have battled for customers by abandoning long-reviled payment plans and adding a relentless stream of perks.

The question for the government regulators who must bless the deal, and all of us: are the good times over? 

Under its branded “Uncarrier” corporate persona, T-Mobile has been a disrupter in wireless, the first carrier to do away with onerous contracts, pay off early termination fees for customers willing to switch to its service, and it helped stoke the spread of “unlimited” data pricing plans.

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