From Reuters: AT&T is prepared to make concessions to U.S. antitrust regulators and address concerns that the T-Mobile deal is anti-competitive and could cause wireless prices to rise, according to sources close to the deal.

Details of AT&T's proposed two-prong settlement were not available, but it is expected to include pledges to maintain T-Mobile's relatively cheap mobile subscription plans, and asset sales.

AT&T may have to sell up to 25 percent of T-Mobile's business, including airwaves and customers, two sources said, to address the government's concern that just three companies would control 90% of the U.S. wireless market if the merger goes through.