Sistema will be announcing its Q1 2011 results on Wednesday 15th June and hosting a conference call at 5pm moscow time.

Wednesday, 15 June 2011

9.00 AM (EDT) / 2.00 PM (UK) / 3.00 PM (CEST) / 5.00 PM (MOSCOW)

Host:

Evgeniy Chuikov - Head of Investor Relations Department      
Speakers:

Mikhail Shamolin - President and Chief Executive Officer

Anton Abugov - First Vice President, Head of Strategy and Development functional division

Alexey Buyanov - Senior Vice President, Chief Financial Officer

To participate in the conference call, please dial:

UK/ International: +44 20 8515 2302
US:  +1 480 629 9645

The earnings release will be posted approximately five hours prior to the conference call and the management’s slide presentation will be posted approximately one hour prior to the conference call at: https://www.sistema.com/investors/presentations/

A replay of the conference call will be available on the Company’s website www.sistema.com for seven days after the event.