February 2006

28.02.2006
Free CLIP for JEANS Users Prolonged to July 1!

MTS is pleased to announce that its free CLIP service for all JEANS tariff plans, including the Basic”, “Favorite”, “All Own People”, “Universal” and “Be More Practical” tariff plans, will be extended until July 1, 2006.

28.02.2006
Free CLIP for JEANS Users Prolonged to July 1!

MTS is pleased to announce that its free CLIP service for all JEANS tariff plans, including the Basic”, “Favorite”, “All Own People”, “Universal” and “Be More Practical” tariff plans, will be extended until July 1, 2006.

22.02.2006
MTS’ Intranet Roaming

MTS announces changes to its intranet roaming services in some Russian regions.

22.02.2006
MTS’ Intranet Roaming

MTS announces changes to its intranet roaming services in some Russian regions.

22.02.2006
MTS’ Intranet Roaming

MTS announces changes to its intranet roaming services in some Russian regions.

21.02.2006
Two New MTS Sales and Customer Care Offices in Moscow: Novy Arbat and Gorbushkin Dvor

MTS is pleased to announce the opening of two new sales and customer care offices in Moscow!

21.02.2006
Two New MTS Sales and Customer Care Offices in Moscow: Novy Arbat and Gorbushkin Dvor

MTS is pleased to announce the opening of two new sales and customer care offices in Moscow!

21.02.2006
Two New MTS Sales and Customer Care Offices in Moscow: Novy Arbat and Gorbushkin Dvor

MTS is pleased to announce the opening of two new sales and customer care offices in Moscow!

20.02.2006
MTS Quiz: Forward with i-mode!

MTS offers its users a chance to win a Ford Fusion car, i-mode phones and other prizes.

20.02.2006
MTS Quiz: Forward with i-mode!

MTS offers its users a chance to win a Ford Fusion car, i-mode phones and other prizes.

17.02.2006
MTS ‘ February Holiday Opening Hours

From 23—26 February, 2006 MTS’ offices in Moscow and the Moscow region will be open as follows:

17.02.2006
MTS ‘ February Holiday Opening Hours

From 23—26 February, 2006 MTS’ offices in Moscow and the Moscow region will be open as follows:

17.02.2006
MTS ‘ February Holiday Opening Hours

From 23—26 February, 2006 MTS’ offices in Moscow and the Moscow region will be open as follows:

16.02.2006
MTS Announces Subscriber Growth Numbers for January 2006

Moscow, Russian Federation — February 16, 2006 — Mobile TeleSystems OJSC (“MTS” — NYSE: MBT), the largest mobile phone operator in Russia and the CIS, announces that its consolidated subscriber base reached 59.50 million users on January 31, 2006.

14.02.2006
MTS’ New Sales and Customer Care Office in Kolomna

MTS is pleased to announce the opening of a new sales and customer care office in Kolomna, providing the inhabitants of this Moscow region with all the benefits and advantages of MTS' services.

14.02.2006
MTS’ “Favorite” Tariff Plan — Call Your Loved Ones Without Limitation!

A spring holidays special with MTS’ Favorite tariff plan: 1 cent/min for calls to your favorite number, free monthly fees and a DVD as a gift!

14.02.2006
MTS’ “Favorite” Tariff Plan — Call Your Loved Ones Without Limitation!

A spring holidays special with MTS’ Favorite tariff plan: 1 cent/min for calls to your favorite number, free monthly fees and a DVD as a gift!

13.02.2006
Attention! MTS’ new SMS Center number

Attention! MTS’ new SMS Center number is +7 916 899 9100.

13.02.2006
Attention! MTS’ new SMS Center number

Attention! MTS’ new SMS Center number is +7 916 899 9100.

13.02.2006
Attention! MTS’ new SMS Center number

Attention! MTS’ new SMS Center number is +7 916 899 9100.

03.02.2006
20% Olympic Discount for VIP-Users!

MTS is providing a 20% discount on its roaming services in Italy during February.

Contact investor relations:

+ 7 495 223 20 25 ir@mts.ru

MTS Investor Relations
App for iPad