October 2004

29.10.2004
MTS Announces the Launch of its Network in the Volgograd Region

The services of Russia’s largest mobile phone operator are now available to users in the Volgograd region.

29.10.2004
MTS' Intranet Roaming Zone: Volgograd Region

From October 29, 2004 the Volgograd region will be integrated into MTS’ intranet roaming zone.

28.10.2004
MTS Obtains Loans for the Expansion of its Network

Moscow, Russian Federation — October 28, 2004 — Mobile TeleSystems OJSC (“MTS” — NYSE: MBT), the largest mobile phone operator in Russia and the CIS, announces that it has obtained two committed credit facilities in an aggregate amount of approximately $121 million to finance the further expansion of the Company’s network in Russia.

20.10.2004
MTS Increases Ownership in its Tatarstan Subsidiary

Moscow, Russian Federation — October 20, 2004 — Mobile TeleSystems OJSC (“MTS” — NYSE: MBT), the largest mobile phone operator in Russia and the CIS, announces that it has acquired the remaining 47.285% stake in TAIF-TELKOM, increasing its ownership in the company to 100%.

15.10.2004
Note to MTS’ ADR Holders

Moscow, Russian Federation — October 15, 2004 — Mobile TeleSystems OJSC (“MTS” — NYSE: MBT), the largest mobile phone operator in Russia and the CIS, announces the following dividends information to its ADR holders.

12.10.2004
MTS Announces Shareholders’ Nominations for the Company’s Board of Directors

Moscow, Russian Federation — October 12, 2004 — Mobile TeleSystems OJSC (“MTS” — NYSE: MBT), the largest mobile phone operator in Russia and the CIS, announces the nominees for the Company’s Board of Directors.

06.10.2004
MTS Announces Subscriber Growth Numbers for September 2004

Moscow, Russian Federation — October 6, 2004 — Mobile TeleSystems OJSC (“MTS” — NYSE: MBT), the largest mobile phone operator in Russia and the CIS, announces that its consolidated subscriber base reached 26.63 million users on September 30, 2004.

04.10.2004
MTS Signs a $600 million Syndicated Loan Agreement

Moscow, Russian Federation — October 4, 2004 — Mobile TeleSystems OJSC (“MTS” — NYSE: MBT), the largest mobile phone operator in Russia and the CIS, announces that on September 30, 2004 it signed a $600 million syndicated loan facility with leading international financial institutions. This is an increase from the originally launched $500 million.

Contact investor relations:

+ 7 495 223 20 25 ir@mts.ru

MTS Investor Relations
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