January 2007

31.01.2007
Group Guidance for FY 2007

MOSCOW, RUSSIAN FEDERATION – JANUARY 31, 2007 – MOBILE TELESYSTEMS OJSC (“MTS” - NYSE: MBT), THE LARGEST MOBILE PHONE OPERATOR IN RUSSIA AND THE CIS, ANNOUNCES THE FULL YEAR 2007 GUIDANCE FOR THE GROUP AT A MEETING HELD EARLIER TODAY.

17.01.2007
MTS Announces the Appointment of a New Chief Marketing Officer

MOSCOW, RUSSIAN FEDERATION — JANUARY 17, 2007 — MOBILE TELESYSTEMS OJSC («MTS» — NYSE: MBT), THE LARGEST MOBILE PHONE OPERATOR IN RUSSIA AND THE CIS, ANNOUNCES THAT IT HAS APPOINTED A NEW CHIEF MARKETING OFFICER (CMO), MRS. CYNTHIA GORDON.

17.01.2007
MTS Announces Subscriber Growth Numbers for December 2006

MOSCOW, RUSSIAN FEDERATION — JANUARY 17, 2007 — MOBILE TELESYSTEMS OJSC («MTS» — NYSE: MBT), THE LARGEST MOBILE PHONE OPERATOR IN RUSSIA AND THE CIS, ANNOUNCES THAT ITS CONSOLIDATED SUBSCRIBER BASE REACHED 72.86 MILLION USERS ON DECEMBER 31, 2006.

Contact investor relations:

+ 7 495 223 20 25 ir@mts.ru

MTS Investor Relations
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