FCC Commissioner Brendan Carr, a Republican like Pai, has said he backs the merger while a third commissioner, Mike O’Rielly, said he is inclined to support the deal.
The Justice Department wants the companies to sell off additional assets including some wireless spectrum to create a new wireless competitor before agreeing to approve the deal, the person briefed on the matter said.
Though a decision could be reached next week, the person cautioned that it may be delayed.
Justice Department and FCC spokesmen declined to comment, as did Sprint and T-Mobile.
Both the FCC and Justice Department want to create a fourth wireless competitor and Dish, Altice USA Inc and Charter Communications Inc are potential acquirers of Boost and potentially some spectrum, the person, who spoke on condition of anonymity, said.