Financial results

Moscow, Russian Federation – Mobile TeleSystems OJSC (“MTS” - NYSE: MBT), today announces its consolidated US GAAP financial results for the three months ended September 30, 2009.

Moscow, Russian Federation – Mobile TeleSystems OJSC (“MTS” - NYSE: MBT), today announces its consolidated US GAAP financial results for the three months ended June 30, 2009.

Moscow, Russian Federation – Mobile TeleSystems OJSC (“MTS” - NYSE: MBT), today announces its consolidated US GAAP financial results for the three months ended March 31, 2009.

The management of Mobile TeleSystems (MTS) will be holding a conference call to discuss the Company’s First Quarter 2009 Financial and Operating Results on Friday, May 22, 2009.

Moscow, Russian Federation — Mobile TeleSystems OJSC (“MTS” - NYSE: MBT), today announces its consolidated US GAAP financial results for the three months (unaudited) and full year ended December 31, 2008.

The management of Mobile TeleSystems (MTS) will be holding a conference call to discuss the Company’s Fourth Quarter and Full Year 2008 Financial and Operating Results on Wednesday, March 11, 2009.

Moscow, Russian Federation – Mobile TeleSystems OJSC (“MTS” - NYSE: MBT), today announces its unaudited consolidated US GAAP financial results for the three months ended September 30, 2008.

Moscow, Russian Federation — Mobile TeleSystems OJSC («MTS» — NYSE: MBT), the largest mobile phone operator in Russia and the CIS, announces its second quarter¹ 2008 financial and operating results.

Moscow, Russian Federation — Mobile TeleSystems OJSC («MTS» — NYSE: MBT), the largest mobile phone operator in Russia and the CIS, announces its first quarter¹ 2008 financial and operating results.

Moscow, Russian Federation – Mobile TeleSystems OJSC (“MTS” - NYSE: MBT), today announced its consolidated US GAAP financial results for the three months (unaudited) and full year ended December 31, 2007.