March 2009

18.03.2009
MTS Announces Subscriber Growth Numbers for February 2009

Moscow, Russian Federation – Mobile TeleSystems OJSC (“MTS” – NYSE: MBT), the largest mobile phone operator in Russia and the CIS, announces that its consolidated subscriber base reached 91.77 million users on February 28, 2009.

11.03.2009
Mobile TeleSystems Announces Financial Results for the Fourth Quarter and Full Year Ended December 31, 2008

Moscow, Russian Federation — Mobile TeleSystems OJSC (“MTS” - NYSE: MBT), today announces its consolidated US GAAP financial results for the three months (unaudited) and full year ended December 31, 2008.

04.03.2009
Fourth Quarter and Full Year 2008 Financial Results Announcement and Conference Call

The management of Mobile TeleSystems (MTS) will be holding a conference call to discuss the Company’s Fourth Quarter and Full Year 2008 Financial and Operating Results on Wednesday, March 11, 2009.

03.03.2009
Svyaznoy Top Management to Lead MTS Retail Network

Moscow, Russian Federation — Mobile TeleSystems OJSC („MTS“ — NYSE: MBT), the largest mobile phone operator in Russia and the CIS, enters into a management agreement with the majority shareholder of the Svyaznoy group of companies, Mr. Maxim Nogotkov, that assigns a team of top managers from Svyaznoy to supervise MTS’ retail network.

Contact investor relations:

+ 7 495 223 20 25 ir@mts.ru

MTS Investor Relations
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