Google的两步验证机制官方帮助页面：https://support.google.com/accounts/answer/1066447
提到的下载地址：

Downloading the app

You'll need Internet access on your BlackBerry to download Google Authenticator.

1. Open the web browser on your BlackBerry.
2. Visit m.google.com/authenticator.
3. Download and install the application.

但实际测试对某些机型不可用，比如黑莓8820上就无法通过如上地址下载安装。