February 2009

26.02.2009
MTS Increases Ownership in its Dagestan Subsidiary to 100%

Moscow, Russian Federation — Mobile TeleSystems OJSC («MTS» — NYSE: MBT), the largest mobile phone operator in Russia and the CIS, announces that it has acquired the remaining 25.01% stake in its subsidiary in Dagestan from Glaxen Corp., increasing the Company’s ownership to 100%.

17.02.2009
MTS Announces Subscriber Growth Numbers for January 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 91.40 million users on January 31, 2009.

10.02.2009
MTS Acquires Retail Chain in Russia

Moscow, Russian Federation – Mobile TeleSystems OJSC (“MTS” – NYSE: MBT), the largest mobile phone operator in Russia and the CIS, announces that it has acquired a 100% stake in Narico Holdings Limited (Cyprus), a sole owner of Telefon.Ru, one of the largest retail chains in Russia, from Analog Holdings Limited and Delemont Investments Limited.

Contact investor relations:

+ 7 495 223 20 25 ir@mts.ru

MTS Investor Relations
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