January 2003

27.01.2003
Mobile TeleSystems (MTS) has Launched a Five-year $400 Million Bond

Moscow, Russian Federation — January 27, 2003 — Mobile TeleSystems OJSC (“MTS” — NYSE: MBT), the largest mobile cellular operator in Russia and Central and Eastern Europe , today announces that it has successfully launched a $400 million five-year bond.

24.01.2003
21.01.2003
Mobile TeleSystems (MTS) Announces Plans to Issue Eurobonds

Moscow, Russian Federation — January 21, 2003 — Mobile TeleSystems OJSC (“MTS” — NYSE:MBT), the largest mobile cellular operator in Russia and Central and Eastern Europe1, today announces its plans to raise debt financing through the placement of unsecured USD notes under Rule 144A/Regulation S (Eurobond).

20.01.2003
Mobile TeleSystems (MTS) Announcement

Moscow, Russian Federation — January 20, 2003 — Mobile TeleSystems OJSC (“MTS” — NYSE:MBT), the largest mobile cellular operator in Russia and Central and Eastern Europe1, today announces that a lawsuit has been filed with the Commercial Court in Kiev by a company that claims to be an Ukrtelecom shareholder seeking to prevent the sale to MTS by Ukrtelecom of its interest in UMC.

Contact investor relations:

+ 7 495 223 20 25 ir@mts.ru

MTS Investor Relations
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