Core Points - The iPhone Air has officially launched in mainland China, marking the first phone in the region to support eSIM technology [1] - The eSIM service is currently supported by major carriers in mainland China, including China Unicom, China Telecom, and China Mobile, while China Broadcasting Network does not support it [3][4] - The eSIM business is still in its early stages in mainland China, with ongoing improvements in processes and policies [19] Carrier Support - China Unicom, China Telecom, and China Mobile support eSIM services for the iPhone Air (model: A3518), while China Broadcasting Network does not [3] - Not all physical stores support eSIM services; only designated stores of China Unicom can process eSIM applications [3] - China Unicom previously announced a door-to-door eSIM service in Shenzhen, but the status of this service is currently unclear [3] Requirements for eSIM - The requirements for obtaining an eSIM are similar to those for traditional SIM cards, with a limit of 5 active cards per carrier and a total of 10 across all carriers in mainland China [4] - There are no restrictions on the type of plans available for eSIM services, allowing both new applications and transfers from existing cards [5] Application Process - The application process for eSIM is reported to be convenient, taking approximately 10 minutes for activation at a physical store [6] - eSIM services are available for both local and some cross-province applications, but there are limitations on cross-city and cross-province services depending on the carrier [8][9] Eligibility for Foreign Residents - Residents from Hong Kong, Macau, and Taiwan can apply for eSIM services using specific travel documents, but cannot do so from different locations [11] - Foreigners can also apply for eSIM services using their passports or permanent residency documents, but China Telecom does not support this group [12] eSIM Management - Users can manage their eSIMs directly through their device settings, including deleting and switching eSIMs [15][16] - Deleting an eSIM does not cancel the number; users must visit a physical store to transfer or reactivate the eSIM [18] Conclusion - The launch of the iPhone Air signifies the beginning of the eSIM era in mainland China, with expectations for further development and improvements in eSIM services from various brands and products [19]