March 2001

22.03.2001
20.03.2001
Mobile TeleSystems (MTS) reduces cost for outgoing calls

Up to 50% savings on outgoing calls within MTS network Moscow, Russian Federation — 20th March 2001 — Mobile TeleSystems OJSC, Russia’s leading mobile operator, announces up to 50% reduction per minute for outgoing calls to mobile phones within the MTS network (except Blagoveshchinsk and Omsk) in the following Moscow tariffs: “Youth”, “Saver” (with the federal number pre-coded 902), “Favourite” and “Business” (with direct Moscow number). The reduction is to start on 21st March, 2001.

20.03.2001
Mobile TeleSystems (MTS) announces financial results for the fourth quarter 2000 and year ended 31st December 2000

Unprecedented Moscow and regional subscriber growth in 2000 Moscow, Russian Federation — 20th March 2001 — Mobile TeleSystems OJSC (NYSE: MBT), Russia’s largest mobile operator, today made public its financial and operational results for the fourth quarter of the year 2000 and year ended 31st december 2000.

Contact investor relations:

+ 7 495 223 20 25 ir@mts.ru

MTS Investor Relations
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