OREANDA-NEWS. On 28 May 2008 was announced, that the management of Mobile TeleSystems (MTS) will be holding a conference call on Thursday, May 29, 2008, to discuss strategic and operational developments in the Company.

Please note that the conference call will start at:

20:00 hrs (Moscow time)

17:00 hrs (London time)

12:00 hrs (US Eastern time)

To take part in the conference call, please dial one of the following telephone numbers, quoting the Company’s name, MTS:

From the US:                   +1 480 629 9033

From the UK:                   +44 207 190 1525

International:                   +44 207 190 1525

A replay of the conference call will be available on the following telephone numbers from May 29 (from approximately 23:00 hrs Moscow time/20:00 hrs London time/15:00 hrs US Eastern time) to June 8, 2008:

From the US:                    +1 303 590 3030                   PIN 3884475#

From the UK:                    +44 207 154 2833                 PIN 3884475#

International:                    +44 207 154 2833                 PIN 3884475#