Surprises for “MTS Connect Unlimited” and “MTS Connect Unlimited+” subscribers continue February 2, 2012, Yerevan, Armenia – VivaCell-MTS, a subsidiary of “Mobile TeleSystems” OJSC, is glad to announce that from February till May 2012 the “MTS Connect Unlimited” package subscribers for the same price will continue receiving 10GB of high-speed Internet for download monthly, instead of the 5GB before. Similarly, the “MTS Connect Unlimited+” package subscribers will have 20GB of high-speed Internet for download monthly, instead of the 10GB before. For more information one can visit www.vivacell.am, contact 111 free of charge hotline, chat with us through “111 Online”, or approach one of our service centers across Armenia. Be ready for more! VivaCell-MTS... More than operator! VivaCell-MTS (K-Telecom CJSC) is Armenia’s leading mobile operator, having the widest 2G/3.75G/4G 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 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.

---