TUESDAY, 4 SEPTEMBER 2007

11.00 AM (ET) / 4.00 PM (UK) / 7.00 PM (MOSCOW)

The management of Mobile TeleSystems (MTS) will be holding a conference call to discuss the Company's second quarter 2007 financial and operating results.

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

From US:                    +1 480 629 65 60

From UK:                    020 7 190 12 47

International:            +44 20 7 190 1247