T-Mobile, Sprint In Active Merger Talks, CNBC Reports By: TalkMarkets September 19, 2017 at 12:14 PM EDT T-Mobile and Sprint are in active talks for an all stock-for-stock merger, CNBC's David Faber reports, citing sources. Read More >> Related Stocks: Charter Communications Inc Sentinelone Inc Cl A Softbank Corp ADR T-Mobile US