May 2002

Mobile TeleSystems (MTS) financial results for the first quarter 2002

Moscow, Russian Federation — 29 May 2002 — Mobile TeleSystems OJSC (NYSE:MBT), Russia’s largest mobile cellular operator, today reports its results for the first quarter 2002.

Mobile TeleSystems is assigned highest corporate governance score among Russian companies

Standard&Poor’s Rating Agency Assigned Corporate Governance Score of 7.4 to Mobile TeleSystems Moscow, May 20, 2002 — Today, Standard&Poor’s (S&P) announced that it assigned corporate governance score of 7.4 (CGS — 7.4) to Mobile TeleSystems OJSC (NYSE:MBT) on a scale of 1 to 10. This score is the highest among Russian companies.

Mobile TeleSystems launch operations in Perm region

Moscow, May 17, 2002 — Mobile TeleSystems OJSC (NYSE:MBT), Russia’s largest mobile operator, announces the launch of operations in Perm which has a population of 3.1 million. Perm has become the 34th region of the country in which MTS operates.

Mobile TeleSystems buys BM-Telecom — Bashkortostan’s leading mobile operator

Moscow, May 13, 2002 — Mobile TeleSystems OJSC (NYSE:MBT) is pleased to announce the acquisition of the leading GSM mobile telecommunications services provider in the Bashkortostan Republic, BM-Telecom Ltd.


Contact investor relations:

+ 7 495 223 20 25

MTS Investor Relations
App for iPad