T-Mobile Strengthens Next-Generation Broadband Portfolio with Two Strategic Fiber Partnerships Apr 28, 2026 9:04 AM Eastern Daylight Time T-Mobile Strengthens Next-Generation Broadband Portfolio with Two Strategic Fiber Partnerships Share New joint venture with Oak Hill Capital combines GoNetspeed and Greenlight Networks to expand fiber access across key Northeastern markets i3 Broadband joins Un-carrier family through joint venture with Wren House, further growing T-Mobile's fiber portfolio in the Midwest ...