The service works in conjunction with a mobile phone SIM card that supports mobile authentication and enables users to authenticate themselves before making e-transactions.

该服务将个人的身份认证信息植入用户手机的SIM卡中，在用户进行电子交易时，为其提供实现网络实名服务所需的身份认证。

youdao

There's no SIM card in your phone and that's why you can't use the mobile Internet.

你手机里没有sim卡，这就是为什么你不能上网的原因。

youdao

The program can backup all contacts from the mobile phone memory to SD card, it also can restore the data to mobile phone memory from SD card, including the data backup from SIM card.

备份手机中所有重要数据：包括通讯录、通话记录、短信、彩信、电子邮件、日程、文档、图片、视频、音频等多媒体信息，还包括程序等全部文件。

youdao

The carriers say they want to encrypt and store the credentials in the phone's SIM card, the small chips placed in the back of phones to activate access to mobile networks.

WSJ: RIM, Carriers Fight Over Digital Wallet