OREANDA-NEWS. March 22, 2010. Mobile TeleSystems OJSC (the “Company” or “MTS” – NYSE: MBT), the largest mobile phone operator in Russia and the CIS, announces that “COMSTAR – United TeleSystems” JSC (“Comstar” - LSE: CMST), a majority-owned subsidiary of MTS, has released its fourth quarter and full year 2009 financial and operating results.

For full disclosure materials for the period ended December 31, 2009, please visit Comstar’s corporate website at http://www.comstar.ru/en/for_investors/finresults/2009/4q/.