Abstract: China will fully implement the mobile number portability in November, 2019. As of the first half of 2019, 2.3 million users have switched in five pilot cities. The main factors which have an effect on mobile number portability include price, network experience, user service experience, the difficulty of handling and the strategies adopted by op erators. It is estimated that more China Mobile users will likely switch to China Unicom and China Telecom in the initial phase of the carrier-based network transfer. In the latter part, the switching rate will stabilize, and the three operators will reach a new dynamic balance. Faced with the upcoming policy, operators should deal with it from the market and technical side, so as to reduce the negative impact.

Key words: mobile number portability, factors , dynamic equilibrium, market side, technical side