May 2004

31.05.2004
25.05.2004
20.05.2004
20.05.2004
13.05.2004
MTS Announces Subscriber Growth Numbers for April 2004

Moscow, Russian Federation — May 13, 2004 — Mobile TeleSystems OJSC (“MTS” — NYSE: MBT), the largest mobile phone operator in Russia and Ukraine, announces that its consolidated subscriber base reached 20.18 million users on April 30, 2004.

Contact investor relations:

+ 7 495 223 20 25 ir@mts.ru

MTS Investor Relations
App for iPad