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

Portal Software, Inc. (Pink Sheets:PRSF), the premierglobal provider of billing and Revenue Management solutions fortelecommunications and media markets, announced today that SwisscomMobile has successfully completed its migration to Portal's flagshipPortal 7 platform. The migration to Portal 7 delivers support for newdata roaming offerings and concludes the second phase of a multiphaseprogram to replace Swisscom Mobile's legacy billing system. By theproject'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 Mobileis a public limited company with Swisscom Ltd. holding a 75% equitystake and Vodafone Group Plc holding the remaining 25%. Today, thecompany boasts over 65% market share with 4.3 million customers forits NATEL mobile service and has 400 mobile roaming partnersworldwide. Leveraging the Portal 7 platform, Swisscom has successfullyintroduced new, profitable data roaming options for their inbound andoutbound roaming customers such as Blackberry, Telematics, GPRS/UMTS,PWLAN and content services.

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

The move to a proactive and standards-based billing and RevenueManagement solution prepares Swisscom for the increasing proliferationof data and content services expected to emerge as its networkscontinue to modernize. Furthermore, support for data roaming enablesSwisscom to deliver a full portfolio of services to its roamingcustomers offering a true seamless service experience. Portal'sroaming manager delivers maximum flexibility on products and bundlesusing up-to-date standards, such as TAP3, to rapidly take advantage ofglobal roaming initiatives whilst hiding the complexity of thethird-party value chain.

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

About Portal Software, Inc.

Portal is the leading worldwide provider of billing and RevenueManagement solutions for the global communications and media markets.The company delivers the only platform for the end-to-end managementof customer revenue across offerings, channels, and geographies.Portal's solutions enable companies to dramatically accelerate thelaunch of innovative, profit-rich services while significantlyreducing the costs associated with legacy billing systems. Portal isthe Revenue Management partner of choice to the world's leadingservice providers, including Vodafone, AOL Time Warner, DeutscheTelekom, Telstra, NTT, China Telecom, Reuters, China Mobile, TelenorMobil, and France Telecom.

Forward-Looking Statement

Statements in this release regarding potential customerrelationships, the possibility of Portal providing contracted servicesand realizing future financial gains are forward-looking statements.Such forward-looking statements may not materialize and involvesignificant uncertainties and risks. These and other factors aredescribed in detail in our Annual Report on Form 10-K for the fiscalyear 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 dateset forth at the beginning of this release. Portal undertakes noobligation to update the information in this release in the eventfacts or circumstances subsequently change.

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