Three months after T-Mobile USA’s CEO Philipp Humm quit to move to Vodafone(s vod), the carrier finds itself welcoming its new chief. Deutsche Telekom has named former Global Crossing CEO John Legere to take over its US mobile arm.

Legere, 54, will officially change offices on Sept. 22, when interim CEO Jim Alling will return to his old job as T-Mobile’s COO.