July 2006

26.07.2006
UMC Announces Acquisition of License for <nobr>CDMA 450</nobr> Telecommunications Services in Ukraine

MOSCOW, RUSSIAN FEDERATION — JULY 17, 2006 — UMC, A LEADING UKRAINIAN MOBILE OPERATOR AND 100% OWNED BY MOBILE TELESYSTEMS OJSC («MTS» — NYSE:MBT), ANNOUNCES THE ACQUISITION OF A LICENSE TO PROVIDE CDMA 450-BASED TELECOMMUNICATIONS SERVICES IN UKRAINE.

25.07.2006
New Ring Tones: Voices of Dom 2 Participants!

MTS’ GOOD’OK from the Dom 2 service will now allow users to set up voices of their favorite Dom 2 participants to replace their usual ring tones!

25.07.2006
MTS’ Tariff Plans — Changes

MTS will change the first call minute fee on some of its tariff plans.

24.07.2006
MTS’ MotoDenim Promotion

Buy a Motorola L2 or L6 phone and receive a prize!

20.07.2006
Reduced Outgoing MMS Charges!

Outgoing MMS messages will be charged as outgoing SMS messages to the summer end.

20.07.2006
Reduced Outgoing MMS Charges!

Outgoing MMS messages will be charged as outgoing SMS messages to the summer end.

17.07.2006
MTS Acquires Dagtelecom

MOSCOW, RUSSIAN FEDERATION — JULY 17, 2006 — MOBILE TELESYSTEMS OJSC («MTS» — NYSE: MBT), THE LARGEST MOBILE PHONE OPERATOR IN RUSSIA AND THE CIS, ANNOUNCES THAT IT HAS ACQUIRED A CONTROLLING STAKE IN DAGTELECOM, A MOBILE PHONE OPERATOR IN THE SOUTH OF RUSSIA.

11.07.2006
MTS Announces Subscriber Growth Numbers for June 2006

MOSCOW, RUSSIAN FEDERATION — JULY 11, 2006 — MOBILE TELESYSTEMS OJSC («MTS» — NYSE: MBT), THE LARGEST MOBILE PHONE OPERATOR IN RUSSIA AND THE CIS, ANNOUNCES THAT ITS CONSOLIDATED SUBSCRIBER BASE REACHED 64.10 MILLION USERS ON JUNE 30, 2006.

10.07.2006
Business Without Limits — Unlimited Calls Throughout Russia

Unlimited calls throughout Russia at only 199 USD!

10.07.2006
Business Without Limits — Unlimited Calls Throughout Russia

Unlimited calls throughout Russia at only 199 USD!

10.07.2006
Business Without Limits — Unlimited Calls Throughout Russia

Unlimited calls throughout Russia at only 199 USD!

07.07.2006
MTS’ New Service: Night Calls on the First Tariff Plan

Make as many night calls as you want Monday to Friday for less!

06.07.2006
MTS’ Official Statement Regarding Bitel

MOSCOW, RUSSIAN FEDERATION — JULY 6, 2006 — MOBILE TELESYSTEMS OJSC («MTS» — NYSE: MBT), THE LARGEST MOBILE PHONE OPERATOR IN RUSSIA AND THE CIS, ADVISES THAT ANY TRANSACTIONS INVOLVING BITEL ARE ILLEGAL.

03.07.2006
MTS’ «First» Tariff Plan: An Extensive Choice of Services

MTS offers First users an extensive choice of new services.

Contact investor relations:

+ 7 495 223 20 25 ir@mts.ru

MTS Investor Relations
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