News

Moscow, Russian Federation – Mobile TeleSystems OJSC (the “Company” or “MTS” – NYSE: MBT), the largest mobile phone operator in Russia and the CIS, announces that it has sent an irrevocable notice to ING Bank, N.V. (London branch), the Agent of the Lenders under the syndicated loan agreement originally signed in May 2009 and amended in June 2009, regarding the voluntary prepayment of the loan.

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 97.81 million users on December 31, 2009.

Moscow, Russian Federation – Mobile TeleSystems OJSC (“MTS” – NYSE: MBT), the largest mobile phone operator in Russia and the CIS, announces that it has reached an agreement with Sberbank to lower the interest rates on RUB 59 billion in financing raised in August and September 2009¹.

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 OAO Eurotel (Eurotel), one of the leading federal transit operators in Russia, from Mortfield Holdings Limited (Cyprus).

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 97.11 million users on November 30, 2009.

Moscow, Russian Federation – Mobile TeleSystems OJSC (“MTS” – NYSE: MBT), the largest mobile phone operator in Russia and the CIS, announces that it has acquired through an exchange of shares an 11.06% stake in COMSTAR – United TeleSystems (“COMSTAR-UTS” – LSE: CMST), a leading supplier of integrated telecommunication solutions in Russia and the CIS, and indirectly an additional 14.20% stake in OAO Moscow City Telephone Network (MGTS), Moscow’s incumbent fixed-line telecommunications operator.

Moscow, Russian Federation – Mobile TeleSystems OJSC (“MTS” – NYSE: MBT), the largest mobile phone operator in Russia and the CIS, announces that it has entered into a credit facility in the amount of up to $212.5 million backed by China Export and Credit Insurance Corporation (SINOSURE) to be used for the development of the Company’s mobile networks through purchases of equipment from Huawei, a leader in providing next-generation telecommunications network solutions for operators around the world.

Moscow, Russian Federation – Mobile TeleSystems OJSC (“MTS” – NYSE: MBT), the largest mobile phone operator in Russia and the CIS, announces that it has entered into a credit facility in the amount of up to $165 million backed by Export Development Canada (EDC) to be used for the development of the Company’s mobile networks.

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 97.16 million users on October 31, 2009.

Moscow, Russian Federation – Mobile TeleSystems OJSC (“MTS” - NYSE: MBT), today announces that “COMSTAR – United TeleSystems” JSC (“Comstar” - LSE: CMST), a majority-owned subsidiary of MTS, has concluded a non-binding MOU with OAO Svyazinvest and AFK Sistema to begin negotiations over the reorganization of certain assets, that if realized could ultimately lead to the disposal of Comstar’s stake in Svyazinvest and the increase in its ownership stake in OAO Moscow City Telephone Network (MGTS).