October 2003

31.10.2003
27.10.2003
Results of Extraordinary General Meeting

Moscow, Russian Federation — October 27, 2003 — Mobile TeleSystems OJSC ("MTS" — NYSE: MBT), the largest mobile phone operator in Russia, reports results of an extraordinary general meeting of shareholders held on October 25, 2003.

23.10.2003
SMS “WITCH”

Super show “The Witches of Eastwick” holds the first prize drawing for those who have no objection to enjoy oneself. Those who are angry, irritated, have no sense of humor or partner for a long, are asked not to worry. Others are offered the magic of up-to-date technologies on your mobile phone.

17.10.2003
14.10.2003
MTS Completes Acquisition of Stakes in Three Regional Companies

Moscow, Russian Federation — October 14, 2003 — Mobile TeleSystems OJSC ("MTS" — NYSE: MBT), the largest mobile phone operator in Russia, today announces that it has completed previously announced transactions to acquire stakes in three regional companies — Volgograd Mobile, Astrakhan Mobile, and Mar Mobile GSM.

09.10.2003
Mobile TeleSystems (MTS) has Launched a Seven-year $400 Million Bond

Moscow, Russian Federation — 9 October, 2003 — Mobile TeleSystems OJSC (“MTS” — NYSE: MBT), the largest mobile cellular operator in Russia, announces that it has successfully launched a $400 million seven-year bond.

09.10.2003
MTS and Beeline GSM set up the unified SMS-environment in Russia

Russia's leading cellular operators "Mobile TeleSystems" OJSC and "Vimpelcom" OJSC launched SMS in all regions covered by their networks.

07.10.2003
MTS Revises its Financial Information for the Six Months Ended June 30, 2003

Moscow, Russian Federation — October 7, 2003 — Mobile TeleSystems OJSC (“MTS” — NYSE: MBT), the largest mobile phone operator in Russia, today announces that the Company revised its previously released financial information for the six months ended June 30, 2003.

02.10.2003
MTS Applied for its Shares Listing in Russia

Moscow, Russian Federation — October 2, 2003 — Mobile TeleSystems OJSC (“MTS” — NYSE: MBT) today announces plans to raise financing through the placement of senior unsecured USD-denominated eurobonds issued under Rule 144A/Regulation S. The notes will be issued through MTS’ 100% beneficially-owned subsidiary, Mobile TeleSystems Finance S. A., a company organized under the laws of Luxembourg, and will be guaranteed by MTS. The notes will be offered and sold outside the United States in offshore transactions in reliance on Regulation S under the U. S. Securities Act and in the United States to “qualified institutional buyers” (as defined in Rule 144A under the U. S. Securities Act) in reliance on Rule 144A.

02.10.2003
Earn by your mind in SMS-game “What? Where? When?”

Ladies and gentlemen! MTS invites you to participate in the game "What? Where? When?" via SMS". A new series of games start on October 10, 2003 on ORT channel at 10.50 pm Moscow time.

01.10.2003
Give pleasure to your friend — fulfill his wish!

Ladies and gentlemen! From October 1 to December 23, 2003 MTS with the publishing house "Moskovsky komsomolets" hold the joint campaign "MK Give wish". Try to guess a wish of your people, send it to us and maybe you will have fortune on your side - the wish will be fulfilled and you will be rewarded by the ocean of happy faces and smiles.

Contact investor relations:

+ 7 495 223 20 25 ir@mts.ru

MTS Investor Relations
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