Moscow, Russian Federation – Mobile TeleSystems OJSC (“MTS” – NYSE: MBT), the largest mobile phone operator in Russia and the CIS, announces the appointment of Mr. Andrey Ushatskiy as the new Chief Technology Officer and Vice President, Technology.

Mr. Andrey Ushatskiy will be responsible for managing technology development, strengthening the efficiency of the Company’s networks and enforcing high quality standards across the MTS Group. Mr. Ushatskiy is highly experienced in network operations and development. He has been at MTS for over 10 years in various technology-related positions, most recently as the Deputy Head of MTS Russia for Technology.

Mr. Valery Shorzhin, the current IT Director of the MTS Group, will continue to manage IT-related activities in his current role, reporting directly to the President and CEO of the Company.

Mr. Aleksander Bogatyrev, the former Vice President for Network and Information Technology, will remain with MTS as the Advisor to the President.

“By separating responsibilities for network development and information technology, MTS is adopting best global practices that will help us make our networks more efficient and ensure the high quality standards that have become traditionally associated with the MTS brand across our markets of operations. Andrey Ushatskiy is a highly experienced professional with unique knowledge of MTS. As the CTO of the MTS Group, Andrey will be responsible for maintaining high network quality standards, developing next-generation technologies and sharing best practices across the MTS Group,” noted Mr. Mikhail Shamolin, President and CEO of MTS.

Biography

Mr. Andrei Ushatskiy has been with MTS since 1996, advancing from a specialist position to a variety of network operations roles to becoming the Deputy Head of MTS Russia for Technology. He has graduated from the Moscow Power Engineering Institute in 1997 and received an executive MBA from the Academy of National Economy under the Government of the Russian Federation in 2004. Mr. Ushatskiy was born in 1974.