September 2010

29.09.2010
MTS Reports Interim Results of VTO

Moscow, Russian Federation – Mobile TeleSystems OJSC (“MTS” – NYSE: MBT), the leading telecommunications provider in Russia and the CIS, announces interim results as of September 28, 2010 of the Company’s acquisition of 36,256,945 ordinary Comstar shares or 8.68% of Comstar’s issued share capital. The acquisition was made in conjunction with MTS’ Voluntary Tender Offer (“VTO”) to Comstar shareholders that closed on September 21, 2010.

23.09.2010
Comstar Shareholders Approve Additional Conditions to the Sale of the 25%+1 Share in Svyazinvest

Moscow, Russian Federation – Mobile TeleSystems OJSC (“MTS” - NYSE: MBT), today announces the decisions made at the extraordinary general meeting of shareholders of COMSTAR – United TeleSystems JSC (“Comstar” - LSE: CMST), a majority-owned subsidiary of MTS, that was held on September 22, 2010.

22.09.2010
MTS Announces Submission Results of the Voluntary Tender Offer for Comstar Shares

Moscow, Russian Federation – Mobile TeleSystems OJSC (“MTS” – NYSE: MBT), the leading telecommunications provider in Russia and the CIS, announces the submission results of MTS’ Voluntary Tender Offer (“VTO”) to acquire up to 37,614,678 COMSTAR – United TeleSystems JSC (“Comstar” – LSE: CMST) ordinary shares. The VTO closed on September 21, 2010 for Comstar shareholders. VTO applications have been submitted for a total of 125,215,743 Comstar shares (including shares underlying Global Depositary Receipts, “GDRs”), representing 29.96% of Comstar’s issued share capital.

10.09.2010
Fitch Affirms MTS Credit Rating with Stable Outlook

Moscow, Russian Federation – Mobile TeleSystems OJSC (“MTS” – NYSE: MBT), the leading telecommunications provider in Russia and the CIS, announces that Fitch Ratings has affirmed the Company’s existing bond ratings at BB+ level and outlook stable.

Contact investor relations:

+ 7 495 223 20 25 ir@mts.ru

MTS Investor Relations
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