Dish seems to have had a tough day Wednesday, getting bad news from two sides.
Earlier this year, the satellite provider won $13.3 billion worth of bids in a spectrum auction and claimed $3.3 billion in discounts aimed at small businesses, according to the WSJ report.
The company reportedly received the discounts through two small entities, SNR Wireless and Northstar Wireless, which reportedly conspired to place the bids on behalf of Dish.
Federal Communications Commission Chairman Tom Wheeler sent a draft order to commissioners recommending the discounts be rejected, WSJ reported, citing sources. Dish did not return CNBC's requests for comment on the matter.
The report wasn't the only bad news Dish faced Thursday.
The slowdown brings up the question whether any deal will get done this year or at all, Bloomberg reported Thursday, citing sources with knowledge of the matter.
Shares of both companies hit session lows immediately after the report surfaced, with T-Mobile falling about 1 percent and Dish shares dropping about 4 percent. Both stocks were flat in after-hours trading.
Dish declined to comment on the merger, and T-Mobile was not immediately available for comment.