October 2009

23.10.2009
MTS Announces the Results of the Extraordinary General Meeting of Shareholders

Moscow, Russian Federation – Mobile TeleSystems OJSC (“MTS” – NYSE: MBT), the largest mobile phone operator in Russia and the CIS, announces the decision made at the Extraordinary General Meeting (EGM) of the Company’s shareholders on October 22, 2009.

21.10.2009
MTS Announces Subscriber Growth Numbers for September 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 96.86 million users on September 30, 2009.

19.10.2009
Ad Hoc Notice

Moscow, Russian Federation – Mobile TeleSystems OJSC (“MTS” – NYSE: MBT), the largest mobile phone operator in Russia and the CIS, affirms guidance statements issued today at the MTS Analyst and Investor Day by the management of the Company.

14.10.2009
Moody's Confirms MTS Credit Rating with Stable Outlook

Moscow, Russian Federation – Mobile TeleSystems OJSC (“MTS” – NYSE: MBT), the largest mobile phone operator in Russia and the CIS, announces that Moody's Investors Service has confirmed the Ba2 corporate family and senior unsecured rating of MTS following the completion of MTS’ acquisition of a controlling stake in Comstar-UTS. Moody's also reiterated that the outlook on the rating remains stable.

13.10.2009
MTS Acquires Controlling Stake of COMSTAR-UTS

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 50.91% stake in COMSTAR – United TeleSystems (“COMSTAR-UTS” – LSE: CMST), a leading supplier of integrated telecommunication solutions in Russia and the CIS, from AFK Sistema.

09.10.2009
Fitch Affirms MTS Credit Rating with Stable Outlook

Moscow, Russian Federation – Mobile TeleSystems OJSC (“MTS” – NYSE: MBT), the largest mobile phone operator in Russia and the CIS, announces that Fitch Ratings has removed MTS from Rating Watch Negative and affirmed existing bond ratings at BB+ level. The outlook was changed from negative to stable.

08.10.2009
MTS Acquires Teleforum Mobile Retail Chain

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 Teleforum LLC from EWINSER INVESTMENT S.A. (British Virgin Islands) and a private party.

07.10.2009
New MTS Subsidiary

Moscow, Russian Federation – Mobile TeleSystems OJSC (“MTS” – NYSE: MBT), the largest mobile phone operator in Russia and the CIS, announces that ‘Telekoms Operator LLC’ became a new subsidiary of the Company.

Contact investor relations:

+ 7 495 223 20 25 ir@mts.ru

MTS Investor Relations
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