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T-Mobile Stirs ‘Grave Concerns’ at DOJ on Bid to End Old Network

  • Antitrust division weighs in on Dish dispute with T-Mobile
  • Network fight stems from Dish acquisition of Boost last year
A Boost Mobile store in Washington, D.C.

A Boost Mobile store in Washington, D.C.

Photographer: Graeme Sloan/Bloomberg

Antitrust officials at the U.S. Justice Department said they have “grave concerns” about plans by T-Mobile US Inc. to shut down the wireless network used by millions of Boost Mobile customers.

The department’s worries were disclosed Monday in a regulatory filing by Dish Network Corp., which bought Boost as part of an antitrust settlement approved by the Justice Department that cleared the way for T-Mobile’s takeover of Sprint Corp. last year. T-Mobile operates the 3G network known as CDMA that’s used by Boost.