July 2004

28.07.2004
0623 — Moscow Business Guide: Answers Your Questions

MTS offers its users a new voice service: Moscow Business Guide.

28.07.2004
New MTS Service: CLIR on Request

MTS is delighted to offer you a new service: CLIR on Request.

27.07.2004
Samsung Promotion

From July 26 until August 31, 2004, MTS is holding the “We are the Team” promotion at MTS offices in Moscow, Samara, Perm, Chelyabinsk and Tyumen, devoted to the ХХVII Summer Olympic Games in Athens, in conjunction with Samsung.

21.07.2004
The MTS Trademark enters the Tomsk Region

Tomskaya Cellular Communications Joins the Unified MTS Network

16.07.2004
MTS Enters the Uzbek Market

Moscow, Russian Federation — July 16, 2004 — Mobile TeleSystems OJSC (“MTS” — NYSE: MBT), the largest mobile phone operator in Russia and Ukraine, announces that it has signed agreements to acquire a leading mobile phone operator in Uzbekistan.

07.07.2004
MTS Announces Subscriber Growth Numbers for June 2004

Moscow, Russian Federation — July 7, 2004 — Mobile TeleSystems OJSC (“MTS” — NYSE: MBT), the largest mobile phone operator in Russia and Ukraine, announces that its consolidated subscriber base reached 22.78 million users on June 30, 2004.

05.07.2004
MTS Plans a $500 million Syndicated Loan

Moscow, Russian Federation — July 5, 2004 — Mobile TeleSystems OJSC (“MTS” — NYSE: MBT), the largest mobile phone operator in Russia and Ukraine, announces that it has mandated four international banks to arrange a $500 million syndicated loan.

01.07.2004
MTS Increases Its Ownership in Primtelefon to 100%

Moscow, Russian Federation — July 1, 2004 — Mobile TeleSystems OJSC (“MTS” — NYSE: MBT), the largest mobile phone operator in Russia and Ukraine, has acquired an additional 50% stake in Primtelefon, a mobile phone operator in the Far East and Siberian regions of Russia. As a result of this transaction, MTS’ ownership in the company increases to 100%.

Contact investor relations:

+ 7 495 223 20 25 ir@mts.ru

MTS Investor Relations
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