Swisscom Mobile Upgrades to Portal 7; Consumers Benefit From Speedy Launch of New Data Services; Adding Support for Data Roaming Completes Second Phase of Billing System Transformation.

CUPERTINO, Calif. -- Portal Software, Inc. (Pink Sheets:PRSF), the premier global provider of billing and Revenue Management solutions for telecommunications and media markets, announced today that Swisscom Mobile has successfully completed its migration to Portal's flagship Portal 7 platform. The migration to Portal 7 delivers support for new data roaming offerings and concludes the second phase of a multiphase program to replace Swisscom Mobile's legacy billing system. By the project's completion, Portal will also be providing the billing, invoicing, and revenue sharing capabilities for Swisscom Mobile.

A pioneer in mobile communications in Switzerland, Swisscom Mobile is a public limited company with Swisscom Ltd. holding a 75% equity stake and Vodafone Group Plc holding the remaining 25%. Today, the company boasts over 65% market share with 4.3 million customers for its NATEL mobile service and has 400 mobile roaming partners worldwide. Leveraging the Portal 7 platform, Swisscom has successfully introduced new, profitable data roaming options for their inbound and outbound roaming customers such as Blackberry, Telematics, GPRS/UMTS, PWLAN and content services.

"Swisscom Mobile is steadfast in its belief that the modernization of our billing system is key to sustaining, and growing, our competitive advantage," said Wolfgang Weber, CTO at Swisscom Mobile. "Portal continues to drive business agility and flexibility into our revenue management infrastructure."

The move to a proactive and standards-based billing and Revenue Management solution prepares Swisscom for the increasing proliferation of data and content services expected to emerge as its networks continue to modernize. Furthermore, support for data roaming enables Swisscom to deliver a full portfolio of services to its roaming customers offering a true seamless service experience. Portal's roaming manager delivers maximum flexibility on products and bundles using up-to-date standards, such as TAP3, to rapidly take advantage of global roaming initiatives whilst hiding the complexity of the third-party value chain.

"Swisscom's ability to bring new data services to market in record time further validates Portal's platform approach to convergent billing," said Bhaskar Gorti, SVP, Worldwide Sales, Services, Marketing and Alliances at Portal. "Today's service providers demand billing solutions that can short circuit time-to-market and time-to-revenue for new services -- this is what we've built Portal 7 to deliver upon."

About Portal Software, Inc.

Portal is the leading worldwide provider of billing and Revenue Management solutions for the global communications and media markets. The company delivers the only platform for the end-to-end management of customer revenue across offerings, channels, and geographies. Portal's solutions enable companies to dramatically accelerate the launch of innovative, profit-rich services while significantly reducing the costs associated with legacy billing systems. Portal is the Revenue Management partner of choice to the world's leading service providers, including Vodafone, AOL Time Warner, Deutsche Telekom, Telstra, NTT, China Telecom, Reuters, China Mobile, Telenor Mobil, and France Telecom.

Forward-Looking Statement 

Statements in this release regarding potential customer relationships, the possibility of Portal providing contracted services and realizing future financial gains are forward-looking statements. Such forward-looking statements may not materialize and involve significant uncertainties and risks. These and other factors are described in detail in our Annual Report on Form 10-K for the fiscal year ended January 31, 2004 and our quarterly reports on Form 10-Q. All statements made in this press release are made only as of the date set forth at the beginning of this release. Portal undertakes no obligation to update the information in this release in the event facts or circumstances subsequently change.

(C) 1996-2006 PORTAL, and the PORTAL LOGO are trademarks or registered trademarks in the United States and in other countries, all owned by Portal Software, Inc. or its subsidiaries.