CSL and Sonera Launch World's First Commercial Inter-operator Multimedia Messaging Service

First MMS Between Asia and Europe, Enabled by GRXs From Sonera and Aicent

June 12, 2002--Hong Kong CSL Ltd., Sonera Corp., and Aicent, Inc. today jointly announced the launch of the world's first commercial inter-operator Multimedia Messaging Service (MMS) over Aicent's and Sonera's GPRS Roaming Exchange (GRX) networks. The service opens a new era in mobile messaging: Now mobile users in Hong Kong and Finland can send MMS messages, including voice, text and images, to each other; and they can access their home MMS services while visiting each other's network.

Regarded as a key driver of the 2.5G and 3G mobile data market, MMS is the latest focus of many GPRS operators around the world, and is strongly supported by the GSM Association. Last February, Sonera became the first operator to show that inter-operator MMS works in practice. Since then both CSL and Sonera have launched MMS in their respective markets, with CSL in March as the first in Asia. Sonera launched its MMS service earlier today, with a wide range of MMS services from numerous content providers.

Roaming and interconnection are key issues for MMS, as a significant portion of the messages will be exchanged by mobile users served by different operators. For MMS, these inter-operator exchanges are enabled by GRX, the only managed mobile IP data network connecting multiple GPRS operators. In the case of CSL and Sonera, the MMS messages are transited via two GRXs -- Aicent's and Sonera's -- through a mutual peering arrangement.

"We are pleased to launch intercontinental MMS with Sonera. This commercial launch is the result of our continuous collaboration, and marks yet another significant milestone in our effort to provide world-class mobile data services to our mobile customers," said Hubert Ng, chief executive officer of CSL. "We held our first MMS Conference in Hong Kong this May and received encouraging response from developers as well as customers. We are confident that MMS will continue to boost data usage in both personal and corporate markets, and is a natural progression to the next generation of mobile communications."

"We have previously teamed up with Hong Kong CSL to provide the world's first GPRS roaming demonstration and, long before that, the first GSM roaming between Europe and Asia," said Timo Levoranta, senior vice president, Sonera Services. "Today, we are proud once again to be the first in the commercial implementation of MMS roaming -- across two continents. Furthermore, this event validates the role of GRX as a centralized, flexible, end-to-end managed IP network that benefits all GPRS/UMTS operators."

"GRX is already an integral part of the global GPRS mobile data network," concurred David Zhang, CTO and VP of Engineering of Aicent, "and it's destined to play an ever-increasing role beyond simple data roaming because of its manageability, security, and QoS, which are all key requirements for tomorrow's mobile data services. The successful MMS inter-connectivity over GRX between CSL and Sonera is an important step in migrating towards next-generation GRX services that promise to deliver even more value to mobile operators."

About the Companies

CSL is a pioneer in the mobile communications market in Hong Kong. The Company launched its mobile services early in 1983 and today operates a world-class GSM/Dual Band network through its mobile brands: 1010 and One2Free. Pioneer to introduce HSCSD, GPRS and MMS, the Company is also committed to deploying cutting-edge technologies and building a world-class 3G infrastructure after awarding a 3G Mobile Service License in Hong Kong in 2001. CSL is a joint venture of Telstra (60%) and PCCW (40%). For more information, please visit the Company's website at www.hkcsl.com.

Sonera Corp. (HEX:SRA) = is a leading provider of mobile and advanced telecommunications services. Sonera is growing as an operator, as well as a provider of transaction and content services in Finland and in selected international markets. The company also offers advanced data solutions to businesses, and fixed network voice services in Finland and neighboring markets. In 2001, Sonera's revenues totaled EUR 2.2 billion, and profit before extraordinary items and taxes was EUR 0.45 billion. Sonera employs about 9,000 people. www.sonera.com

Aicent provides 2.5G/3G mobile data solutions and services to mobile operators and enterprises globally. Aicent's current product and service offerings include GRX services, mobile messaging services, and mobile office services. Aicent recently announced the largest commercial, GRX-based GPRS roaming network in Asia, serving more than a dozen leading mobile operators with a collective subscriber base of over 135 million, or around 70 percent of GSM/GPRS users in the Asia Pacific region. Aicent is based in San Jose, Calif., and has regional operation centers and offices in major Asian cities. For more information about Aicent, visit www.aicent.com.