Moscow, Russian Federation – Mobile TeleSystems OJSC (“MTS” – NYSE: MBT), the leading telecommunications operator in Russia and the CIS, announces that it has filed its annual report on Form 20-F for the fiscal year ended December 31, 2012 with the United States Securities and Exchange Commission.

The document can also be found at https://www.mtsgsm.com/resources/annual_reports/ of the Investor Relations section. Hard copies of the document with the Company’s complete audited financial statements will be available free of charge to shareholders upon request.

For further information, please contact in Moscow:

Joshua B. Tulgan
Director, Corporate Finance & Investor Relations
Mobile TeleSystems OJSC
Tel: +7 495 223 2025
E-mail: ir@mts.ru