The document discusses the evolving relationship between telecom operators and mobile value-added service (VAS) providers. It notes that telecom operators are facing falling profit margins from voice and are transforming their roles to include content providers, mobile portals, location brokers, and transaction providers. However, they now face challenges and competition in these new roles from third-party providers. The relationship model between telecom operators and VAS providers is shifting from network-operator centric to either service aggregator-centric or service provider-centric. A service aggregator-centric model following the iMode example may be most effective by allowing functional independence while leveraging the telco's mass market reach.