In 2G networks, the SIM card and SIM application were bound together, so that "SIM card" could mean the physical card, or any physical card with the SIM application.
在2G网络中，SIM卡和SIM应用程序绑定在一起，因此“SIM卡”可以表示物理卡，或者任何具有SIM应用程序的物理卡。