December 2010

30.12.2010
Ad Hoc Notice

Moscow, Russian Federation – Mobile TeleSystems OJSC (“MTS” – NYSE: MBT), the leading telecommunications provider in Russia and the CIS, announces completion of the dividend payment for the full year 2009.

27.12.2010
MTS Completes Acquisition of Sistema Telecom

Moscow, Russian Federation – Mobile TeleSystems OJSC (“MTS” – NYSE: MBT), the leading telecommunications provider in Russia and the CIS, announces that it has completed the acquisition of 100% of Sistema Telecom LLC (“Sistema Telecom”), a subsidiary of JSFC Sistema (“Sistema” – LSE: SSA).

24.12.2010
MTS Group Acquires Alternative Operator in Saint Petersburg

Moscow, Russian Federation – Mobile TeleSystems OJSC (“MTS” – NYSE: MBT), the leading telecommunications provider in Russia and the CIS, announces that the MTS Group through Comstar-Regions, a wholly-owned subsidiary of Comstar-UTS, has acquired 100% in Lanck Telecom LLC (“Lanck Telecom”), an alternative operator in Saint Petersburg, from a group of private investors. The acquisition allows MTS Group to strengthen its position in the Saint Petersburg corporate market.

21.12.2010
Ministry of Communications of Turkmenistan Suspends MTS’ Operations

Moscow, Russian Federation – Mobile TeleSystems OJSC (“MTS” – NYSE: MBT), the leading telecommunications provider in Russia and the CIS, announces that the Company has suspended its operations in Turkmenistan in accordance with the notice from the Ministry of Communications of Turkmenistan received by MTS on December 15, 2010. The notice informed the Company of a decision to suspend licenses held by Barash Communications Technologies, Inc. (“BCTI”), MTS’ wholly-owned subsidiary in Turkmenistan, for a period of one month starting from December 21, 2010.

21.12.2010
MTS Group Acquires Leading Alternative Operator in Novosibirsk

Moscow, Russian Federation – Mobile TeleSystems OJSC (“MTS” – NYSE: MBT), the leading telecommunications provider in Russia and the CIS, announces that the MTS Group through Comstar-Regions, a wholly-owned subsidiary of Comstar-UTS, has acquired 100% in Novosibirsk Multiservice Company LLC (“NMC”), a leading alternative operator in the Novosibirsk region, from a group of private investors for RUB 725 million ($23.6 million1 ) including debt considerations.

20.12.2010
Ad Hoc Notice

Moscow, Russian Federation – Mobile TeleSystems OJSC (“MTS” – NYSE: MBT), the leading telecommunications provider in Russia and the CIS, announces that the Company now controls a 99.999% stake in Brands LLC.

16.12.2010
MTS Receives Notice from the Ministry of Communications of Turkmenistan

Moscow, Russian Federation – Mobile TeleSystems OJSC (“MTS” – NYSE: MBT), the leading telecommunications provider in Russia and the CIS, announces that on December 15, 2010 it received a notice from the Ministry of Communications of Turkmenistan informing the Company of a decision to suspend licenses held by Barash Communications Technologies, Inc. (“BCTI”), MTS’ wholly-owned subsidiary in Turkmenistan, for a period of one month starting from December 21, 2010. MTS has been operating in Turkmenistan under a trilateral agreement1 (“Agreement”) signed in November 2005 by BCTI, MTS and the Ministry of Communications of Turkmenistan, which expires on December 21, 2010, unless extended pursuant to its terms and conditions. The Company at all times had reasons to believe that the Agreement would be extended and had approached the Ministry of Communications within the required timeframe to formalize the extension. However, the Ministry of Communications failed to grant the extension in accordance with the terms of the Agreement.

16.12.2010
Head of Business Unit “MTS Russia” Aleksander Popovskiy Joins the GSMA Board

Moscow, Russian Federation - Mobile TeleSystems OJSC (“MTS”; NYSE: MBT), the largest mobile phone operator in Russia and the CIS, announces that Aleksander Popovskiy, Head of Business Unit “MTS Russia”, has joined the GSMA Board, the organisation which represents the worldwide mobile industry. MTS has held a seat on the GSMA Board since 2008 and has been represented by Mr. Mikhail Shamolin, President and CEO of MTS.

13.12.2010
MTS Ranked the Most Valuable Brand in Russia

Moscow, Russian Federation – Mobile TeleSystems OJSC (“MTS” – NYSE: MBT), the leading telecommunications provider in Russia and the CIS, announces that the MTS brand has been ranked as the most valuable Russian brand by InterBrand, a world’s leading brand consultancy. With a brand value of $7.753 billion, MTS leads the “Best Russian Brands-2010” ranking.

13.12.2010
MTS Refinances Sberbank Loans

Moscow, Russian Federation – Mobile TeleSystems OJSC (“MTS” – NYSE: MBT), the leading telecommunications provider in Russia and the CIS, announces that it has signed an agreement with Sberbank to open two non-revolving lines of credit for a total amount of RUB 100 billion.

09.12.2010
Ad Hoc Notice

Moscow, Russian Federation – Mobile TeleSystems OJSC (“MTS” – NYSE: MBT), the leading telecommunications provider in Russia and the CIS, announces that the MTS Board of Directors has approved the transaction to acquire 100% of Sistema Telecom LLC (“Sistema Telecom”), a non-operating subsidiary of JSFC Sistema (“Sistema” – LSE: SSA), based on the recommendation received from the Special Committee of Independent Directors to the Board (“Special Committee”). Earlier, the Company received the necessary approvals from the Federal Antimonopoly Service.

Contact investor relations:

+ 7 495 223 20 25 ir@mts.ru

MTS Investor Relations
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