October 2001

30.10.2001
MTS upgrades its billing system

Moscow, Russian Federation — 30 October 2001 — Mobile TeleSystems OJSC (NYSE: MBT), Russia’s largest GSM 900/1800 mobile operator, has upgraded its current billing system.

23.10.2001
MTS launches its network in Kirov

Moscow, Russian Federation — 23 October 2001 — Mobile TeleSystems OJSC (NYSE: MBT), Russia’s largest GSM 900/1800 mobile operator, today announced the launch of its operations in Kirov. This brings the number of Russian regions in which the MTS network now operates to a total of 26.

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+ 7 495 223 20 25 ir@mts.ru

MTS Investor Relations
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