China's Unicom to sell Apple's iPhones

The video discusses China Unicom's strategy to leverage supply chain advantages for mid-range supply, highlighting a partnership with Apple to launch iPhone models 3G and 3GS in the Chinese market. The collaboration aims to enhance user experience through China Unicom's high-speed network. Financial performance is also reviewed, showing a decline in procurement costs and growth in user engagement.

中端配置的iPhone手機為什麼適合中國市場消費習慣？

根據文本，399.08億元的數字代表了什麼樣的變化？