https://www.reuters.com/article/us-sprint-m-a-tmobile-exclusive/exclusive-t-mobile-sprint-close-to-agreeing-deal-terms-sources-idUSKCN1BX1EK >T-Mobile US Inc is close to agreeing tentative terms on a deal to merge with peer Sprint Corp , people familiar with the matter said, a major breakthrough in efforts to merge the third and fourth largest U.S. wireless carriers.