October 2002

31.10.2002
MTS Completes Acquisition of Two Regional Operators

Moscow, Russia — October 31, 2002 — Mobile TeleSystems OJSC (“MTS” — NYSE:MBT) has acquired the remaining 33.33% stake in CJSC Dontelecom. MTS has also acquired a 100% stake in Bit LLC, a company that holds GSM licences for four regions of Russia.

29.10.2002
21.10.2002
11.10.2002
01.10.2002

Contact investor relations:

+ 7 495 223 20 25 ir@mts.ru

MTS Investor Relations
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