May 2001

22.05.2001
Mobile TeleSystems OJSC enters mobile market in Russia’s North-West

MTS Completes Acquisition of Telekom XXI Moscow, St. Petersburg, Russian Federation — 22 May 2001 — Mobile TeleSystems OJSC (NYSE: MBT), Russia’s largest mobile operator, today announced it has completed acquisition of Telekom XXI OJSC.

21.05.2001
Mobile TeleSystems (MTS) announces financial results for the first quarter 2001

Moscow, Russian Federation — 22 May 2001 — Mobile TeleSystems OJSC (NYSE: MBT), Russia’s leading mobile operator, today announced its financial and operational results for the three-months ended 31st March 2001. Financial highlights.

14.05.2001
Mobile TeleSystems (MTS) presents a new GSM service

MTS is enhancing the range of value added services providing mobile access to the Internet’s resources Moscow, Russian Federation — 14 May 2001 — MobileTeleSystems OJSC (NYSE: MBT), Russia’s leading mobile operator, presented a new service — SIM browser — a special application based on enhanced features of a SIM-card at the “Svyaz Expocomm — 2001” international exhibition.

14.05.2001
Mobile TeleSystems OJSC launches GPRS networks in regions

MTS develops packet data transmission in its network Moscow, Russian Federation — 14 May 2001 — Mobile TeleSystems OJSC (NYSE: MBT), Russia’s leading mobile operator, announced a technical launch of GPRS (General Packet Radio Service) networks in the Tver, Smolensk, Yaroslavl and Kostroma regions.

14.05.2001
MTS and Siemens carry out first live demonstration of UMTS 3G mobile network in Russia

Moscow, Russia, May 14. — Mobile TeleSystems OSJC (NYSE: MBT), the leading Russian mobile operator, and Siemens Information and Communication Mobile carried out the first live demonstration of UMTS 3G mobile communication system in Russia at the “Svyaz Expocomm — 2001” international exhibition. The live demonstration of UMTS equipment featured the first demonstration of an up to 1.2 Mbit/s data rate over the air. MTS is currently preparing the launch of Russia’s first UMTS test network in Moscow.

14.05.2001
Mobile TeleSystems OJSC is on the way to a global informational environment

Moscow, Russian Federation — 14 May 2001 — Mobile TeleSystems (NYSE: MBT), Russia’s leading mobile operator, announced one of its main strategic goals to ensure mobility of the Internet using 2,5 and 3G technologies.

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