Mobile TeleSystems OJSC (MTS) announced the departure of Dr. Michael Hecker, the company's Vice President for Strategy, M&A and Corporate Development, member of the Executive Board. On December 19, 2013, the company's board of directors terminated the authority of Dr. Michael Hecker, MTS Vice President for Strategy, M&A and Corporate Development, member of the Executive Board, effective January 09, 2014.