Moscow, Russian Federation – Mobile TeleSystems OJSC (“MTS” or the “Company” – NYSE: MBT), the leading telecommunications provider in Russia and the CIS, announces appointment of Ivan Zolochevsky to the position of General Director of Business Unit “MTS Ukraine”, who previously served as Director of the North-West Macro-Region of MTS in Russia.

“In recent years, we realized significant accomplishments in our Ukrainian business,” remarked Andrei Dubovskov, President and Chief Executive Officer of MTS. “We are seeing growth in key performance indicators and a positive effect from our corporate strategy. Likewise, Mr. Zolochevsky has developed into one of the most effective regional managers in MTS by virtue of his success and demonstrated leadership of one of the most important regions in Russia. In his new role, Mr. Zolochevsky will not only continue to implement our strategy, but also provide a further impetus to strengthen our position in the Ukraine market.”

Replacing Mr. Zolochevsky will be Kirill Dmitriev, who previously managed MTS’s business in Western Ukraine.

“We are confident that Mr. Dmitriev’s experience and expertise will be useful in sustaining the dynamic and vibrant growth we’ve seen in the North-West region,” continued Mr. Dubovskov.

Biography:

Ivan Zolochevsky joined MTS in January 2005 as a branch manager for MTS in Tula. In June 2005 he was appointed to the position of Director of the North-West Macro Region of MTS, where his responsibilities included oversight of MTS’s mobile and fixed business operational management in all regions of the North-West Federal District. Prior to joining MTS, from 2001 to 2005, Mr. Zolochevsky served as a sales director of BCC, a St. Petersburg-based company. From 1998 to 2001 he was a Head of Corporate and Market Sales of St. Petersburg company “Nienschanz”. Before 1998, he served in “Transas” group of companies in sales and marketing. Mr. Zolochevsky was born on February 9, 1972 in Vyborg. He graduated with a degree in Physics from the St. Petersburg Pedagogical Institute n.a. A. Herzen. In 2001 he finished The British Open University with a specialty in Management. Mr. Zolochevsky also finished the course of the Presidential Program in Engineering and Economics Academy with a focus on management and marketing.

Kirill Dmitrievhas held the position of Director, Western territorial administration of MTS Ukraine, since March 2009, where he was responsible for the Company’s business in six areas – Lviv, Ivano-Frankivsk, Ternopil, Transcarpathian, Chernivtsi and Volyn. He joined MTS from the company Baltic Beverages Holding Ukraine (BBH Ukraine), where he served from 2006 as a national sales development manager. From December 2007 he served as Director, Key Retail Customers BBH Ukraine. From 2002 to 2005 he worked in “Brewery “Vienna” OJSC, which was majority-owned by Baltic Beverages Holding, as a regional sales manager responsible for the central Urals. Mr. Dmitriev started his career in 2000 at British American Tabacco, the largest tobacco-manufacturing company, where he held various positions in the sales department. Mr. Dmitriev was born in 1978 in the Leningrad region in Kingisepp. In 2000, he graduated from the Faculty of Economics and Management of St. Petersburg State University of Economics and Finance.