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在过去的几年当中(U)SIM卡的功能发展巳远远超出了简单的用户认证这个基本功能。目前通过STK(USAT)或者OTA等通信方式(U)SIM卡已可以直接完成手机用户和运营商网络之间的信息传递。这样一来手机用户可以享受到一些新的增值服务如手机银
Over the past few years (U) SIM card function development has gone far beyond the simple user authentication of this basic function. At present, the transmission of information between the mobile phone user and the operator’s network can be completed directly through the SIM card such as USART or OTA. As a result, mobile phone users can enjoy some new value added services such as mobile phone silver