A U.S. district judge is expected to rule in favor of T-Mobile's merger with Sprint.
That's according to two sources, familiar with the case.
The verdict in a controversial lawsuit to stop the takeover is set to be handed down Tuesday.
It would combine the third and fourth largest U.S. wireless carriers and create a telecommunications giant.
The approval of the deal would also be a high profile defeat - for state attorneys general, led by New York and California.
They've argued that the merger would lead to higher prices - especially for customers who use prepaid plans, popular with people who have poor credit.
The deal has already been approved by federal regulators.
Both companies have long argued the deal was critical to their futures.
They also say its needed for their plans to roll out 5G networks.
T Mobile Chief Executive John Legere testified during the trial-saying that Sprint's business was deteriorating and would not survive without a merger.
T-Mobile parent Deutsche Telekomis is keen to cut the price of the deal.
They argue Sprint's fortunes have deteriorated since they inked their agreement.
Shares of Sprint surged 69% in after hours trade and T-Mobile stock rose 8%.
The two sources also say the companies are expected to start talks on renegotiating the terms of their $26 billion-dollar merger in the next few days.