This document discusses the value chain of mobile value-added services (VAS) in Vietnam. It outlines the major technologies used to deliver VAS, including SMS, IVR, USSD, WAP, and apps. It also identifies the main players in the Vietnam mobile market, such as telecom companies, content providers, media companies, and handset makers. The value chain involves original content developers, developers, publishers, payment gateways, and marketing agencies. The document asks the audience to identify their core value and role within this value chain. It stresses the importance of trusted partnerships, game-changing products, and professionalism.