April 2010

29.04.2010
MTS Repurchases Series 02 Ruble-Denominated Bond

Moscow, Russian Federation – Mobile TeleSystems OJSC (“MTS” – NYSE: MBT), the leading telecommunications provider in Russia and the CIS, announces the repurchase of the series 02 ruble-denominated bond in the amount of 6.3 billion rubles.

28.04.2010
MTS Ranked among the World’s 100 Most Powerful Brands with a Brand Value of $9.7 billion

Moscow, Russian Federation – Mobile TeleSystems OJSC (“MTS” – NYSE: MBT), the leading telecommunications provider in Russia and the CIS, announces that it has been named as one of the BRANDZ™ Top 100 Most Powerful Brands, a ranking published by the Financial Times and Millward Brown, a leading global market research and consulting firm. MTS once again joins the ranks of the most powerful brands in the world with a value of $9.7 billion at the 72nd position. As in 2008 and 2009, MTS is the most valuable Russian brand in the ranking.

26.04.2010
MTS Repurchases Series 01 Ruble-Denominated Bond

Moscow, Russian Federation – Mobile TeleSystems OJSC (“MTS” – NYSE: MBT), the leading telecommunications provider in Russia and the CIS, announces the repurchase of the series 01 ruble-denominated bond in the amount of 7.1 billion rubles.

20.04.2010
MTS Announces an ADR Ratio Change

Moscow, Russian Federation – Mobile TeleSystems OJSC (“MTS” – NYSE: MBT), the leading telecommunications provider in Russia and the CIS, announces that it will be changing its current American Depositary Receipt (ADR) ratio effective May 3, 2010.

16.04.2010
Decisions of MTS’ Board of Directors

Moscow, Russian Federation – Mobile TeleSystems OJSC (“MTS” – NYSE: MBT), the leading telecommunications provider in Russia and the CIS, announces the decisions reached at the Board of Directors (BoD) meeting held on April 15, 2010.

15.04.2010
MTS Ruble Bonds Receive “A1” Listing on MICEX

Moscow, Russian Federation – Mobile TeleSystems OJSC (“MTS” – NYSE: MBT), the leading telecommunications provider in Russia and the CIS, announces that the Company’s five outstanding ruble-denominated bonds have been moved to the “A1” quotation list on the Moscow Interbank Currency Exchange (MICEX).

07.04.2010
MTS and Disney Sign Deal to Deliver Digital Content to Russia

Moscow, Russian Federation – Mobile TeleSystems OJSC (“MTS” – NYSE: MBT), the leading telecommunications provider in Russia and the CIS, and The Walt Disney Company CIS (“Disney”) signed a deal to deliver Disney’s movies and television shows via the Internet in Russia. MTS will deliver Disney’s content to the Russian market through it proprietary content portal Omlet.ru, allowing Russian consumers to access legal content from one of the Hollywood’s major studios.

06.04.2010
MTS Raises Financing from the Bank of Moscow

Moscow, Russian Federation – Mobile TeleSystems OJSC (“MTS” – NYSE: MBT), the leading telecommunications provider in Russia and the CIS, announces that it has signed a credit agreement with the Bank of Moscow in the amount of RUB 22 billion.

Contact investor relations:

+ 7 495 223 20 25 ir@mts.ru

MTS Investor Relations
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