Mobile carrier T-Mobile (TMUS) - Get T-Mobile US, Inc. Report and pay-TV operator Dish Network (DISH) - Get DISH Network Corporation Class A Report have agreed to a divestiture deal, sources told CNBC, as T-Mobile looks to gain regulatory approval for its proposed $26 billion merger with Sprint (S) - Get SENTINELONE, INC. Report

The Department of Justice has been pressuring T-Mobile and its Bonn parent, Deutsche Telekom, to shed assets like wireless spectrum licenses in the interest of maintaining competition in the cellular market. 

T-Mobile and Sprint are the third- and fourth-largest mobile carriers in the country behind No. 1 Verizon (VZ) - Get Verizon Communications Inc. Report and AT&T (T) - Get AT&T Inc. Report

CNBC reported that last month Dish Chairman Charlie Ergen met with Federal Communications Commission Chairman Ajit Pai and antitrust chief Makan Delrahim to advocate for "the need for a minimum of four nationwide mobile network operators" in order to maintain competitive balance, according to an FCC filing. 

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Dish shares are rising 1.3% to $39.37 while T-Mobile was up 1.1% to $74.99.