T-Mobile is shipping the Galaxy S8 early just like it did with the S7 - The Verge
Amazon.com: Samsung Galaxy S8 SM-G950U 64GB Black T-Mobile
T-Mobile, Verizon Galaxy S8 and S8+ Units Receiving Day One Update
Amazon.com: Samsung Galaxy S8 PLUS (SM-G955) Android Smartphone GSM Unlocked by T-Mobile (compatible with all GSM Carriers, not CDMA carriers), Black (Renewed)
Samsung Galaxy S8 Plus T-Mobile 64gb for sale in Sherman Oaks, CA - 5miles: Buy and Sell