"With an impressive track record of driving financial strategy and broad operations across technology and telecommunications industries, James Kavanaugh will be a tremendous addition to the T-Mobile Board of Directors," said Mike Sievert, CEO of T-Mobile. "His skillset and leadership qualities will complement the leadership we have on our board and be very valuable as the Un-carrier continues to drive toward our mission to be the best in the world at connecting customers to their world." About T-Mobile US, Inc. T-Mobile US, Inc. TMUS is America's supercharged Un-carrier, delivering an advanced 4G LTE and transformative nationwide 5G network that will offer reliable connectivity for all. T-Mobile's customers benefit from its unmatched combination of value and quality, unwavering obsession with offering them the best possible service experience and undisputable drive for disruption that creates competition and innovation in wireless and beyond.