T-Mobile US and Sprint are reportedly near a deal to sell spectrum, wholesale network access, and Sprint’s Boost Mobile subsidiary to Dish as part of an attempt to gain government approval of their merger. But US antitrust officials reportedly want bigger concessions before they’ll approve the T-Mobile/Sprint combination.

T-Mobile’s purchase of Sprint would leave the US with three instead of the current four major wireless carriers. The Department of Justice, which could sue to block the deal, has apparently pushed T-Mobile to make divestitures that would set up a fourth major carrier to replace Sprint. That has left T-Mobile negotiating with Dish, which opposed the T-Mobile/Sprint merger. The companies’ feud is a two-way street, with T-Mobile repeatedly criticizing Dish for buying spectrum and not using it.