December 2001

26.12.2001
MTS and Siemens have successfully carried out demonstration of the 3G network — UMTS

Moscow, Russian Federation, December 26, 2001. Mobile TeleSystems OJSC (NYSE: MBT), Russia’s largest cellular operator, and Siemens Information and Communication Mobile (IC Mobile) have successfully demonstrated an operating fragment of a 3G UMTS test network. The practical demonstration included voice calls between mobile terminal devices and between mobile terminal devices and ISDN phones, data transmission and the possibilities of 3G applications.

24.12.2001
MTS Enters Debt Market

Moscow, Russian Federation — 24 December 2001 — Mobile TeleSystems OJSC (“MTS”) has issued a USD 250 million three-year Eurobond through its wholly owned subsidiary Mobile TeleSystems Finance S.A.

18.12.2001
Mobile TeleSystems launches its network in Ivanovo

MTS network now operates in 29 regions of Russia Moscow, Russian Federation — 18 December 2001 — Mobile TeleSystems OJSC (NYSE: MBT), Russia’s largest GSM 900/1800 mobile operator, today announced the launch of its operations in Ivanovo.

11.12.2001
“Mobile TeleSystems” is entering St. Petersburg mobile market

Moscow, Russian Federation — 11 December, 2001 — Mobile TeleSystems OJSC, (NYSE: MBT), Russia’s largest GSM 900/1800 mobile operator, today announces the official launch of its St Petersburg network.

04.12.2001
03.12.2001
MTS Plans to Issue Eurobonds

Moscow, Russian Federation — 03 December, 2001 — Mobile TeleSystems OJSC (“MTS”) is considering accessing the international capital markets in early December through the issuance of senior unsecured USD bonds (the “Notes”) through a wholly-owned Luxembourg financing subsidiary, guaranteed by MTS.

Contact investor relations:

+ 7 495 223 20 25 ir@mts.ru

MTS Investor Relations
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