June 2002

27.06.2002
MTS starts operations in Belarus

Moscow, Russia — 27 June 2002 — Mobile TeleSystems OJSC (NYSE:MBT), Russia’s largest cellular operator, announces the launch of its network in Belarus. The network will be operated through a Belarus-Russian Joint Venture LLC “Mobile TeleSystems” (LLC MTS).

21.06.2002
19.06.2002
19.06.2002
Mobile TeleSystems expands operations into three new Russian regions

MTS Network now covers 39 Russian Regions Moscow, RF — June 19, 2002 — Mobile TeleSystems OJSC (NYSE:MBT) announces the launch of operations in Karelia, Tambov, and the Altai Republic, in line with the Company’s regional expansion strategy.

18.06.2002
13.06.2002
11.06.2002
06.06.2002

Contact investor relations:

+ 7 495 223 20 25 ir@mts.ru

MTS Investor Relations
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