VivaCell-MTS, a subsidiary of Mobile TeleSystems OJSC, announces that the network handled 4,283,556 SMS messages on December 31, the New Years Eve before midnight, with a further 3,260,562 on January 1, 2012. At the same time, 18,131,557 calls were handled through VivaCell-MTS network on December 31, 2011 before midnight, and another 19,253,316 on January 1, 2012. In total 7,544,118 short messages and 37,384,873 calls were handled by VivaCell-MTS network on December 31, 2011 and January 1, 2012. Compared to the same period of the previous year, the number of calls increased by 0.22 %. VivaCell-MTS (K-Telecom CJSC) is Armenia’s leading mobile operator, having the widest 2G/3.5G/4G networks reach and spreading a wide range of Voice and Data services all across Armenia. Having the best of the Armenian people interest at heart since its launch on 1st July 2005 and in a short period of time VivaCell-MTS has managed to build a nationwide network and a considerable customer base. VivaCell-MTS drives innovation and aims at always being at the forefront of any development serving the Armenian mobile communications market. For more information, visit www.vivacell.am * * * Mobile TeleSystems OJSC ("MTS") is the leading telecommunications group in Russia, Eastern Europe and Central Asia, offering mobile and fixed voice, broadband, pay TV as well as content and entertainment services in one of the world's fastest growing regions. Including its subsidiaries, the Group services over 100 million mobile subscribers. The Group has been awarded GSM licenses in Russia, Ukraine, Uzbekistan, Armenia and Belarus, a region that boasts a total population of more than 230 million. Since June 2000, MTS' Level 3 ADRs have been listed on the New York Stock Exchange (ticker symbol MBT). Additional information about the MTS Group can be found at www.mtsgsm.com.

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