Moscow, Russia – March 21, 2011 – “COMSTAR – United TeleSystems” JSC (“Comstar” or “the Company”) (LSE: CMST), the largest integrated telecommunications provider in Moscow and 84 Russian cities, with a presence in Ukraine and Armenia, today confirms that, following the announcement on 24 February 2011 of Comstar’s intention to cancel the listing of the global depositary receipts (“GDRs”) representing ordinary shares in Comstar from the Official List of the UK Listing Authority and cancel the admission of the GDRs to trading on the London Stock Exchange (the “GDR Delisting”), it will be seeking to effect the GDR Delisting on 25 March 2011.

Information regarding Comstar’s statutory merger into MTS, is available at https://www.comstar-uts.ru/en/for_investors/mts/merger_disclaimer/.