Coinspeaker SoftBank to Sell $20 Billion of Its T-Mobile Shares, SFTBY and TMUS Stocks DownThe potential buyer of SoftBank's stake in T-Mobile is Deutsche Telekom AG that already has voting control of T-Mobile and is likely to buy the shares at a small discount.SoftBank to Sell $20 Billion of Its T-Mobile Shares, SFTBY and TMUS Stocks Down