Ukrainian Mobile Communications Chooses NetCracker to Manage its Base of More than 14.0 Million Subscribers

Largest Carrier in Ukraine to Implement NetCracker Solution to optimize network and service infrastructure

Kiev, Ukraine / Waltham, Mass. – April 12, 2006 – NetCracker Technology, an innovator in delivering OSS software solutions for telecom service providers, and Ukrainian Mobile Communication (UMC) today announced that UMC has chosen NetCracker's comprehensive OSS solution to streamline their operations and optimize the utilization of network and service resources. UMC is the largest mobile carrier in the Ukraine with more than 14.0 million subscribers.

According to UMC, the NetCracker solution was chosen to drive operational excellence across the network and service layers through flexibility in network planning, development and operations. UMC will be using the company's Service Inventory and Discovery & Reconciliation Modules, in addition to the company's Auto Design & Assign and Outside Plant Modules.

"We are building the most sophisticated telecommunication network in Ukraine. To provide our subscribers with the best quality of service, UMC chooses the most advanced solutions offered on the telecom market. It's a key priority of our program "Quality Above All", said Adam Wojacki, CEO, UMC.

"When looking for an OSS provider, we evaluated companies on their ability to manage our extended network and services," said Adam Wojacki. "NetCracker offered the most effective and comprehensive solution for us to build service agility while deploying our network resources in the most optimum manner."

This large-scale implementation utilizes NetCracker's solution across UMC's entire network, which includes 87% of the Ukraine and has an extended reach to five continents. The NetCracker solution will help UMC gain fast and automated access to resource information, aligned in a user-friendly manner to services deployed over those resources. The tight correlation between the resources and services will drastically lower data errors and improve overall efficiency of operations.

"UMC has achieved a remarkable level of success, and NetCracker is honored to be chosen as its OSS solution," said Andrew Feinberg, president and CEO, NetCracker Technology. "With NetCracker, UMC has a strategic partner that will help to manage its next phase of growth."

About Ukrainian Mobile Communication

UMC (CJSC "Ukrainian Mobile Communication") a 100% subsidiary of OJSC "Mobile TeleSystems" (NYSE: MBT), services over 14.0 million subscribers. The network of CJSC "Ukrainian Mobile Communication" covers more than 87% of the territory of Ukraine, where 93% of population reside. In July 2005, the company initiated the strategic program "Quality Above All," directed at improvement of the quality of subscriber servicing. OJSC "Mobile TeleSystems" (MTS) is the largest mobile communication operator in Russia and CIS countries. Together with its affiliated companies, MTS serves over 59.50 million subscribers.

About NetCracker Technology

NetCracker Technology, a subsidiary of NEC Corporation, is the leading provider of Telecom Operations and Management Systems to Communications Service Providers worldwide. www.NetCracker.com.

NetCracker is a registered trademark of NetCracker Technology Corp. All other company or product names mentioned in this media alert may be trademarks or registered trademarks of the respective companies with which they are associated.

About NEC Corporation

NEC Corporation is one of the world's leading providers of Internet, broadband network and enterprise business solutions dedicated to meeting the specialized needs of a diversified global base of customers. NEC delivers tailored solutions in the key fields of computer, networking and electron devices, by integrating its technical strengths in IT and Networks, and by providing advanced semiconductor solutions through NEC Electronics Corporation. The NEC Group employs more than 140,000 people worldwide. For additional information, please visit the NEC website at: http://www.nec.com.