May 2012

29.05.2012
MTS Acquires Leading Alternative Operator in Moscow

Moscow, Russian Federation – Mobile TeleSystems OJSC (“MTS” – NYSE: MBT), the leading telecommunications provider in Russia and the CIS, announces that MTS Group, through its subsidiary Moscow City Telephone Network OJSC (“MGTS”), has acquired a 100% stake in Tascom CJSC (“Tascom”), a market leader in providing telecommunication services to corporate clients in Moscow and the Moscow region, from Bester Investments Limited, which is owned by the European Bank for Reconstruction and Development (EBRD), its related funds and certain other private investors.

21.05.2012
Mobile TeleSystems Announces Financial Results for the First Quarter Ended March 31, 2012

Moscow, Russian Federation – Mobile TeleSystems OJSC (“MTS” - NYSE: MBT), the leading telecommunications provider in Russia and the CIS, today announces its unaudited US GAAP financial results for the three months ended March 31, 2012.

14.05.2012
MTS to Partner with Vimpelcom, Megafon, and Rostelecom to Build a Submarine Fiber-Optic Cable in the Far East

Russia, Moscow - Mobile TeleSystems OJSC (“MTS” — NYSE: MBT), the leading telecommunications provider in Russia and the CIS, announces that it has signed a memorandum of understanding with VimpelCom OJSC (trademark "Beeline"), MegaFon OJSC and Rostelecom OJSC to jointly lay and operate an underwater fiber-optic cable joining the Russian Far East with Sakhalin Island. The project, dubbed ‘Sakhalin-Magadan-Kamchatka’, will kick-off in late 2012. According to preliminary estimates, the total cost of the project will amount to RUB 2.4 billion and will be split evenly between four operators on a parity basis. The volume of investments will be specified at the end of 2012 after completion of the feasibility study.

11.05.2012
First Quarter 2012 Financial Results Announcement and Conference Call

The management of Mobile TeleSystems (MTS) will be holding a conference call to discuss the Company’s First Quarter 2012 Financial and Operating Results on Monday, May 21, 2012.

Contact investor relations:

+ 7 495 223 20 25 ir@mts.ru

MTS Investor Relations
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