Special offer for “Classic Flexy” tariff plan subscribers September 23, 2010, Yerevan, Armenia – VivaCell-MTS, a subsidiary of “Mobile TeleSystems” OJSC, informs that now subscribing to the “Classic Flexy” tariff plan one can get an “MTS 236” mobile phone without down payment, paying only AMD 880 per month. This classic style easy-to-use phone is equipped with color screen, polyphonic melodies, flashlight and all the necessary features for everyday communication. In case of getting the phone in the offered way, the AMD 880 adds up to the monthly fee of the tariff plan during the next 12 months. The offer is valid till December 31, 2010. MTS 236 - affordable communication for everyone… Be ready for more! VivaCell-MTS... More than operator! VivaCell-MTS (K-Telecom CJSC) is Armenia’s leading mobile operator, having the widest 2G/ 3G network 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 largest mobile phone operator in Russia and the CIS. Together with its subsidiaries, the Company services over 99.21 million subscribers. The regions of Russia, as well as Armenia, Belarus, Turkmenistan, Ukraine, and Uzbekistan, in which MTS and its associates and subsidiaries are licensed to provide GSM services, have 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 MTS can be found at www.mts.ru

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