February 2007

21.02.2007
MTS announces the appointment of a new director general of UMC

MOSCOW, RUSSIAN FEDERATION – FEBRUARY 21, 2007 – MOBILE TELESYSTEMS OJSC (“MTS” - NYSE: MBT), THE LARGEST MOBILE PHONE OPERATOR IN RUSSIA AND THE CIS, ANNOUNCES THE APPOINTMENT OF MR. PAVEL PAVLOVSKY, VICE PRESIDENT OF MTS, AS THE NEW DIRECTOR GENERAL OF UMC.

20.02.2007
Court Rules in Favor of MTS in its Back Taxes Counter-Claim

MOSCOW, RUSSIAN FEDERATION – FEBRUARY 20, 2007 – MOBILE TELESYSTEMS OJSC (“MTS” - NYSE: MBT), THE LARGEST MOBILE PHONE OPERATOR IN RUSSIA AND THE CIS, ANNOUNCES THAT THE MOSCOW ARBITRAGE COURT RULED IN FAVOR OF MTS IN ITS COUNTER-CLAIM AGAINST THE FEDERAL TAX SERVICE REJECTING TAX CLAIMS FOR THE YEARS 2003 AND 2004 IN THE AMOUNT OF RUR 1.216 BILLION.

12.02.2007
MTS Announces Subscriber Growth Numbers for January 2007

MOSCOW, RUSSIAN FEDERATION — FEBRUARY 12, 2007 — MOBILE TELESYSTEMS OJSC («MTS» — NYSE: MBT), THE LARGEST MOBILE PHONE OPERATOR IN RUSSIA AND THE CIS, ANNOUNCES THAT ITS CONSOLIDATED SUBSCRIBER BASE REACHED 73.41 MILLION USERS ON JANUARY 31, 2007.

01.02.2007
S&P Raises Outlook on Mobile TeleSystems from Stable to Positive

MOSCOW, RUSSIAN FEDERATION — FEBRUARY 01, 2007 — MOBILE TELESYSTEMS OJSC («MTS» — NYSE: MBT), THE LARGEST MOBILE PHONE OPERATOR IN RUSSIA AND THE CIS, ANNOUNCES THAT STANDARD AND POORS HAS RAISED ITS OUTLOOK FROM STABLE TO POSITIVE.

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+ 7 495 223 20 25 ir@mts.ru

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