May 14 News According to the Economic Daily, China Telecom responded today to the news that "5G networks are used or SIM cards need to be replaced", saying that China Telecom's existing 4G users do not need to replace their cards, as long as they change to 5G mobile phones, they can use 5G services in areas covered by 5G signals. The 5G SA security enhanced SIM card of China Telecom is mainly used in industrial application scenarios with higher security enhancement requirements, such as intelligent manufacturing, Internet of Vehicles, telemedicine, smart city and other fields.
中国电信此前发布了5G SA安全增强SIM卡白皮书，白皮书提出了基本功能要求、架构要求、技术要求，详细阐述了新增的5G移动性管理、用户身份隐私保护、安全认证加强、GBA认证、5G接入控制、5G USAT事件等功能与相应的应用场景。
白皮书同时还指出，现阶段用户通过4G卡接入5G网络，现有的4G卡缺少5G标准中定义的新功能和新增的卡文件与服务，用户身份数据在通信过程中使用明文传输，位置信息不够精准，已经不能满足5G网络的信息与安全要求。随着5G行业应用的深入拓展，不能很好地去应对各种业务发展的要求，用户享受不到5G网络带来的全新体验与业务服务。