This study adopts the Delta Model of Hax and Wilde (2001), supplemented by principles and laws of friction-free economy, to analyze the critical success factors of the Multimedia Messaging Service (MMS) industry, combined with secondary data collection and in-depth interviews. We use the Delta Model to investigate the market advantages of MMS value chain's participant industries, and deduce their strategy goal. We propose the five critical success factors of MMS in the mainstream S adoption curve as follows: (1) system platform integration (network interconnection and international roaming), (2) simple billing rule and reasonable pricing plan, (3) content renovation and personalized service, (4) population of MMS handsets, and (5) the integration of vertical and horizontal MMS-related companies.