With the rapid development of mobile communication technology, 4G network sharing has become an important strategy to improve network coverage and service quality. This paper focuses on the 4G network sharing between China Telecom and China Unicom, and explores in depth the regional differences present when implementing this strategy in different regions. By comparing the implementation status of first tier and emerging cities, as well as economically developed and underdeveloped areas, the impact of factors such as economic development level, local policy support, and technological infrastructure on the effectiveness of network sharing was revealed. The research results show that these differences not only affect the quality of network services and user satisfaction, but also have a significant impact on the strategic choices and policy formulation of operators.