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28 May 2002

VimpelCom goes live with Amdocs end-to-end convergent customer care and billing platform

ST. LOUIS, MO and MOSCOW, RUSSIA (May 28, 2002) - Open Joint Stock Company "Vimpel-Communications" ("VimpelCom") (NYSE: VIP), a leading provider of telecommunications services in Russia, and Amdocs (NYSE: DOX), the world's leading provider of billing and customer relationship management to the communications industry, announced the successful launch of Amdocs Ensemble billing platform at VimpelCom. Amdocs provides VimpelCom with a complete convergent billing solution for all voice and data services. More than 2.3 million of VimpelCom's Moscow-based prepaid and postpaid subscribers were migrated from VimpelCom's legacy billing system to Amdocs Ensemble.

"Our subscriber base has more than doubled over the past year, demonstrating our high quality of service and commitment towards the delivery of innovative mobile, voice and data services," said Jere Calmes, Vice President of Customers Operations and Product Management at VimpelCom. "Our partnership with Amdocs and its scalability and flexibility enables us to have a long-term customer care and billing solution that is designed to support our growth as we expand our operations throughout Russia."

The Amdocs Ensemble billing and customer care system deployed at VimpelCom is comprised of over 15 software modules, providing advanced billing and customer relationship management capabilities. This system supports the rapid deployment of advanced next generation data services, such as online stock quotes, traffic reports and entertainment services using mobile devices, and was instrumental in enabling VimpelCom to become the first wireless telecommunications operator to offer commercial GPRS in Russia. Through Amdocs Ensemble, VimpelCom is integrating its billing, ordering and payment process onto a single platform, eliminating the need for redundant systems. Amdocs Ensemble enables VimpelCom to enhance the one-to-one customer relationship by generating a single view throughout the entire customer lifecycle.

"Amdocs is dedicated to expanding its presence in Russia and Eastern Europe, becoming the first Western company to receive an Official Certificate of Conformity by the Russian government for its ability to meet Russian telecom billing compliance for deployment of up to 10 million subscribers," said Simon Cassif, President of Amdocs Europe. "Amdocs is very pleased to be working with industry leaders such as VimpelCom and to expand its successful relationship with Telenor affiliate companies, ensuring that their billing and customer care platforms address all the evolving requirements of the wireless market."

About Amdocs
Amdocs is the world's leading provider of billing and customer relationship management to the communications industry. Amdocs has an unparalleled success record in project delivery of its mission-critical products. With human resources of more than 9,100 information systems professionals, Amdocs supports a global customer base. For more information, visit our Web site at www.amdocs.com.

About VimpelCom
VimpelCom is a leading provider of telecommunications services in Russia, operating under the "Bee Line" family of brand names, which are among the most recognized brand names in Russia. The VimpelCom Group's license portfolio covers approximately 70% of Russia's population (100 million people), including the City of Moscow and the Moscow Region. As of March 20, 2002, VimpelCom had more than 2.6 million subscribers. VimpelCom was the first Russian company to list its shares on the New York Stock Exchange ("NYSE"). VimpelCom's ADSs are listed on the NYSE under the symbol "VIP". VimpelCom's convertible notes are listed on the NYSE under the symbol "VIP 05"

This press release contains "forward-looking statements," as the phrase is defined in Section 27A of the Securities Act and Section 21E of the Exchange Act. These statements include VimpelCom's expectations about its new billing system, including expectations that the billing system will support VimpelCom's growth and that the new billing system will enhance VimpelCom's relationships with its subscribers, and are based on VimpelCom's management's best assessment of VimpelCom's strategic and financial position and of future market conditions and trends. These discussions involve risks and uncertainties. The actual outcome may differ materially from these statements as a result of unforeseen developments from unexpected growth in VimpelCom's subscriber base, competition, governmental regulations of the wireless telecommunications industry, general political uncertainties in Russia and general economic developments in Russia and other factors. As a result of such risks and uncertainties, there can be no assurance that the effects of competition or current or future changes in the political, economic and social environment or current or future regulation of the Russian telecommunications industry will not have a material adverse effect on the VimpelCom Group. Certain factors that could cause actual results to differ materially from those discussed in any forward-looking statements include the risks described in VimpelCom's Annual Report on Form 20-F for the year ended December 31, 2001 and other public filings made by VimpelCom with the U.S. Securities and Exchange Commission, which risk factors are incorporated herein by reference. VimpelCom disclaims any obligation to update developments of these risk factors or to announce publicly any revision to any of the forward-looking statements contained in this release, or to make corrections to reflect future events or developments.

For more information, please contact:

Amdocs
Greg Kalish
Porter Novelli for Amdocs
Tel: 1-212-601-8470
Fax: 1-212-601-8101
E-Mail: gkalish@porternovelli.com

VimpelCom

Valery Goldin
Vice President of International Relations
Tel: 7-095- 974-5888
Fax: 7-095- 721-0017
E-Mail: vgoldin@VimpelCom.com

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