February 2011

25.02.2011
Ad Hoc Notice

Moscow, Russian Federation – Mobile TeleSystems OJSC (“MTS” or the “Company” – NYSE: MBT), the leading telecommunications provider in Russia and the CIS, announces that the Federal Financial Markets Service of Russia (“FFMS”) registered on February 24, 2011 the additional share issue and the issue prospectus with respect to the 103,649,654 ordinary MTS shares with a par value of RUB 0.1. The additional shares will be used for conversion of Comstar-UTS (“Comstar”) ordinary shares into the Company’s ordinary shares as part of the statutory merger of Comstar with MTS. The state registration number of the additional issue is 1-01-04715-А-002D.

24.02.2011
Ad Hoc Notice

Moscow, Russian Federation – Mobile TeleSystems OJSC (“MTS” – NYSE: MBT), the leading telecommunications provider in Russia and the CIS, announces that “COMSTAR – United TeleSystems” JSC (“Comstar” – LSE: CMST), a majority-owned subsidiary of MTS, issued a release informing that, following the announcement on December 24, 2010 that Comstar shareholders had approved the merger of Comstar into MTS pursuant to which Comstar will cease to exist as a separate legal entity, Comstar intends to cancel the listing of the global depositary receipts (“GDRs”) representing ordinary shares in Comstar from the Official List of the UK Listing Authority and cancel the admission of the GDRs to trading on the London Stock Exchange (the “GDR Delisting”).

22.02.2011
Consent Solicitation on the Notes due in 2012

Moscow, Russian Federation – Mobile TeleSystems OJSC (“MTS”, “the Company” or the “Guarantor” – NYSE: MBT), the leading telecommunications provider in Russia and the CIS, announces that Mobile TeleSystems Finance S.A.1 , a wholly-owned subsidiary of the Company, (the “Issuer”), has commenced a consent solicitation (the “Consent Solicitation”) in respect of its senior unsecured USD-denominated Eurobonds in the amount of $400 million with an annual interest rate of 8.00% and maturity in January 2012 (the “Notes”). The Consent Solicitation will expire at 5.00 p.m., New York City time, on February 28, 2011 unless extended by the Issuer (in its sole discretion) (the “Expiration Date”).

15.02.2011
Ad Hoc Notice

Moscow, Russian Federation – Mobile TeleSystems OJSC (“MTS” or “the Company” – NYSE: MBT), the leading telecommunications provider in Russia and the CIS, announces today that MTS International Funding Limited1 has received requisite consents with respect to its consent solicitation for its senior unsecured USD-denominated Eurobonds in the amount of $750 million with an annual interest rate of 8.625% and maturity in June 2020 (the “Notes”). At the meeting held at the offices of Latham & Watkins (London) LLP, 99 Bishopsgate, London EC2M 3XF, United Kingdom at 3.00 p.m. (London time) today, holders of the Notes (the “Noteholders”) duly passed the Extraordinary Resolution set out in the Notice of Meeting previously notified to Noteholders in accordance with the terms of the Trust Deed for such Notes.

11.02.2011
Ad Hoc Notice

Moscow, Russian Federation – Mobile TeleSystems OJSC (“MTS” – NYSE: MBT), the leading telecommunications provider in Russia and the CIS, announces that “COMSTAR – United TeleSystems” JSC (“Comstar” – LSE: CMST), a majority-owned subsidiary of MTS, issued a release informing that Comstar’s Board of Directors has approved the share buyback related to the merger of Comstar into MTS following receipt of approval at the company’s Extraordinary General Meeting of shareholders held on December 23, 2010.

11.02.2011
Submission Results for the MTS Share Buyback

Moscow, Russian Federation – Mobile TeleSystems OJSC (“MTS” – NYSE: MBT), the leading telecommunications provider in Russia and the CIS, announces that the Company’s Board of Directors has today affirmed the share buyback report related to the reorganization of MTS through a merger with OJSC “Comstar-UTS” (“Comstar”), CJSC “Dagtelecom” and OJSC “Eurotel” following receipt of approval at the MTS Extraordinary General Meeting of shareholders (the “EGM”) held on December 23, 2010. Those shareholders that voted against or did not vote were eligible in accordance with Russian law to file for a buyback of their shares within a 45-day period from the date of the EGM.

09.02.2011
Ad Hoc Notice

Moscow, Russian Federation – Mobile TeleSystems OJSC (“MTS” – NYSE: MBT), the leading telecommunications provider in Russia and the CIS, announces that “COMSTAR – United TeleSystems” JSC (“Comstar” - LSE: CMST), a majority-owned subsidiary of MTS, issued a release informing that the Board of Directors of Moscow City Telephone Network JSC (“MGTS”), a majority-owned subsidiary of Comstar, at a meeting, held on February 7, 2011, set a date for an Extraordinary General Meeting of Shareholders (“EGM”) for April 22, 2011.

04.02.2011
Termination of the Offer to Purchase in respect of the Notes due 2012

NOT FOR RELEASE, PUBLICATION OR DISTRIBUTION TO ANY PERSON LOCATED IN THE REPUBLIC OF ITALY. OTHER OFFER AND DISTRIBUTION RESTRICTIONS APPLY.

03.02.2011
Bank of New York Mellon Transfers Interest Payments to Noteholders

Moscow, Russian Federation – Mobile TeleSystems OJSC (“MTS” – NYSE: MBT), the leading telecommunications provider in Russia and the CIS, announces that it has been notified by Mobile TeleSystems Finance S.A. (“MTS Finance”), a wholly owned subsidiary of MTS, that The Bank of New York Mellon (“BNY”), in its capacity as trustee under 8.00% notes due January 28, 2012 issued by MTS Finance (the “Notes”), transferred on February 2, 2011 interest payments to holders of the Notes, on behalf of MTS Finance, that were due and payable under the Notes on January 28, 2011 (the “Interest Payments”).

Contact investor relations:

+ 7 495 223 20 25 ir@mts.ru

MTS Investor Relations
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