<PAGE>
EXHIBIT A
Conformed Copy
JOINT FILING AGREEMENT
We, Telenor East Invest AS, Telenor Communication AS (formerly known as Telenor
AS) and Telenor ASA, the signatories of the amendment to the statement on
Schedule 13D to which this Agreement is attached, hereby agree that such
amendment is filed jointly on behalf of Telenor East Invest AS, Telenor
Communication AS and Telenor ASA. Any subsequent amendments thereto filed by any
of us will be filed jointly on behalf of Telenor East Invest AS, Telenor
Communication AS and Telenor ASA. Telenor East Invest AS and Telenor
Communication AS hereby agree that the joint filing agreement dated March 31,
2000 between them is hereby terminated, and that such Agreement shall be
replaced by this Joint Filing Agreement.
Dated: October 12, 2000 TELENOR EAST INVEST AS
By /s/ Henrik Torgersen
--------------------
Henrik Torgersen
Attorney-in-Fact
TELENOR COMMUNICATION AS
By /s/ Tormod Hermansen
--------------------
Tormod Hermansen
President and
Chief Executive Officer
TELENOR ASA
By /s/ Tormod Hermansen
--------------------
Tormod Hermansen
Chief Executive Officer
11
