OREANDA-NEWS. September 5, 2007. Mobile TeleSystems OJSC ("MTS" — NYSE: MBT), the largest mobile phone operator in Russia and the CIS, announces its second quarter1 2007 financial and operating results.

1 Based on unaudited consolidated financial statements prepared in accordance with accounting principles generally accepted in the United States of America ("US GAAP").

2Q financial results can be found here -http://www1.mtsgsm.com/upload/images/2007_2Q_presentation_eng.pdf