T-Mobile UK managing direector Jim Hyde will quit the company at the end of March.
T-Mobile said the decision was a “persononal one”, and that he has already accepted a new “professional opportunity” outside the business.
Hyde joined T-Mobile UK in January 2006 from T-Mobile USA, where he held a number of leadership positions, including vice president of sales and operations. He has been with T-Mobile for 12 years.
T-Mobile International chief exceutive Hamid Akhavan said: “We appreciate Jim’s contribution during the many years he spent at T-Mobile and whilst we respect his decision, we are sorry to see him leave.
“On behalf of the executive committee of T-Mobile International I would like to wish Jim every success with his future endeavours.”
T-Mobile said it will announce Hyde’s successor in due course.