MTS Launches 3G in Armenia

20 April 2009

Moscow, Russian Federation – Mobile TeleSystems OJSC (“MTS” – NYSE: MBT), the largest mobile phone operator in Russia and the CIS, announces the commercial launch of its 3G network in Armenia.

MTS launches today the first UMTS / HSPA 3G network in Armenia in the three largest cities of the country: Yerevan, the capital of Armenia, Guymri and Vanadzor. The network will be expanded to additional cities during 2009. The next-generation network will deliver faster data download speeds through the advanced UMTS / HSPA technology, enabling such innovative services such as video calling, and increase capacity to handle usage growth.

“By introducing 3G technology in Armenia, we are keen on playing our part in developing the telecommunications infrastructure in the country and offering consumers new products and services as well as enhanced quality,” commented Mr. Oleg Raspopov, Vice President for Foreign Subsidiaries at MTS. “We view our 3G network as an ideal vehicle to meet the growing mobile broadband demand in Armenia and help stimulate further uptake in data and content services.”

Development of UMTS networks is a cornerstone of MTS’ strategy to provide mobile broadband in the CIS. As these markets demonstrate relatively low levels of fixed-line penetration and historic underinvestment in infrastructure, MTS views its networks as an ideal vehicle to meet the growing broadband Internet needs of its subscribers through attractive data products and services.

MTS already operates pan-regional 3G networks in Russia and Uzbekistan and offers high-speed data access through its proprietary CDMA-450 network in Ukraine.

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For further information, please contact:
Mobile TeleSystems, Moscow
Investor Relations
Tel: +7 495 223 2025
E-mail: ir@mts.ru

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Mobile TeleSystems OJSC („MTS“) is the largest mobile phone operator in Russia and the CIS. Together with its subsidiaries, the Company services over 92.19 million subscribers. The regions of Russia, as well as Armenia, Belarus, Turkmenistan, Ukraine, and Uzbekistan, in which MTS and its associates and subsidiaries are licensed to provide GSM services, have a total population of more than 230 million. Since June 2000, MTS’ Level 3 ADRs have been listed on the New York Stock Exchange (ticker symbol MBT). Additional information about MTS can be found on MTS’ website at www.mtsgsm.com.

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Some of the information in this press release may contain projections or other forward-looking statements regarding future events or the future financial performance of MTS, as defined in the safe harbor provisions of the U. S. Private Securities Litigation Reform Act of 1995. You can identify forward looking statements by terms such as „expect,“ „believe,“ „anticipate,“ „estimate,“ „intend,“ „will,“ „could,“ „may“ or „might,“ and the negative of such terms or other similar expressions. We wish to caution you that these statements are only predictions and that actual events or results may differ materially. We do not intend to update these statements to reflect events and circumstances occurring after the date hereof or to reflect the occurrence of unanticipated events. We refer you to the documents MTS files from time to time with the U. S. Securities and Exchange Commission, specifically the Company’s most recent Form 20-F. These documents contain and identify important factors, including those contained in the section captioned „Risk Factors“ that could cause the actual results to differ materially from those contained in our projections or forward-looking statements, including, among others, potential fluctuations in quarterly results, our competitive environment, dependence on new service development and tariff structures, rapid technological and market change, acquisition strategy, risks associated with telecommunications infrastructure, risks associated with operating in Russia and the CIS, volatility of stock price, financial risk management and future growth subject to risks.

Contact investor relations:

+ 7 495 223 20 25 ir@mts.ru

MTS Investor Relations
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