September 2008

19.09.2008
MTS and the administration of the Krasnodar region announce strategic partnership

Moscow, Russian Federation – Mobile TeleSystems OJSC (“MTS” – NYSE: MBT), the largest mobile phone operator in Russia and the CIS, and the administration of the Krasnodar region announce strategic partnership to boost regional development, in light with the Company’s social responsibility program.

19.09.2008
Ad Hoc Notice

New Subsidiary Incorporated
Moscow, Russian Federation – Mobile TeleSystems OJSC (“MTS” – NYSE: MBT), the largest mobile phone operator in Russia and the CIS, announces the incorporation of its wholly owned subsidiary Dega Retail Holding Limited.

18.09.2008
MTS launches 3G networks in Siberia and the Russian Far East

Moscow, Russian Federation – Mobile TeleSystems OJSC (“MTS” – NYSE: MBT), the largest mobile phone operator in Russia and the CIS, announces the launch of 3G networks in Novosibirsk, Norilsk and Vladivostok. MTS becomes the first mobile operator to bring 3G to Siberia and the Russian Far East.

17.09.2008
MTS announces subscriber growth numbers for August 2008

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 87.26 million users on August 31, 2008.

17.09.2008
MTS wins two prestigious Global Telecoms Business Innovation Awards

Moscow, Russian Federation – Mobile TeleSystems OJSC (“MTS” – NYSE: MBT), the largest mobile phone operator in Russia and the CIS, announces that it has won two 2008 Global Telecoms Business Innovation Awards in “Marketing strategy and service innovation” and “International mobile service innovation” categories.

16.09.2008
Nominees to MTS’ Board of Directors

Moscow, Russian Federation – Mobile TeleSystems OJSC (“MTS” – NYSE: MBT), the largest mobile phone operator in Russia and the CIS, announces the decision reached at the Board of Directors meeting held on September 04, 2008.

16.09.2008
MTS receives three nominations for World Communications Awards 2008

Moscow, Russian Federation – Mobile TeleSystems OJSC (“MTS” – NYSE: MBT), the largest mobile phone operator in Russia and the CIS, announces that it has received three nominations for the World Communications Awards 2008. The Company made the shortlist in the “Best Brand”, “Best Mobile Operator” and “Best Project Management” award categories.

Contact investor relations:

+ 7 495 223 20 25 ir@mts.ru

MTS Investor Relations
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