没有卡的手机，eSIM到底是个啥？

Core Viewpoint - Apple's first pure eSIM model, iPhone Air, officially launched in China, marking a significant step towards the widespread adoption of eSIM technology in the smartphone market [1] Group 1: Company Developments - China Unicom, China Mobile, and China Telecom have all announced their approval to conduct commercial trials for eSIM mobile phones [1] - Apple is positioned as a key driver in promoting eSIM technology within the Chinese market [1] Group 2: Industry Trends - The introduction of eSIM technology is accelerating the transition to a "cardless era" in the global smartphone market [1]