客户识别模块卡。

we usually say SIM 卡, haha. Chinese language learns words from the world, SIM card was from US at the first, right? so, yeah, you should've got it.

why can't i add your QQ?It is a error...

手机卡 手机号 sim卡 手机号码卡 这几个词都常用。

手机卡 and 号码卡 are common.