SoftBank Group Corp.'s U.S. wireless carrier unit Sprint Corp. and Deutsche Telekom AG's subsidiary T-Mobile US Inc. announced Sunday they have agreed to merge in a move that would create a major carrier with over 120 million subscribers.The two U.S. carriers aim to complete the merger by the middle of 2019 through a stock swap, with SoftBank giving away a majority stake in the combined firm to Deutsche Telekom.Deutsch Telekom will own about 42 percent in the merged entity, to be called T-Mobile, while SoftBank will have a stake of about 27 percent.SoftBank CEO Masayoshi Son will serve as a…READ FULL ARTICLE