Yes, I'd like to activate my voice mail service please.

我想激活语言信箱服务。

youdao

The service includes caller ID, voice mail, and call waiting.

这项服务包括呼叫方身份识别、语音邮件和呼叫等待。

《柯林斯英汉双解大词典》

The service profile may include a user's IP address, telephone records, buddy lists, voice mail greetings and so on.

服务配置文件可以包含用户的IP地址、电话记录、联系人列表、语音邮件问候语等等。

youdao

"Brian Cobby, the third voice of the Speaking Clock, used to receive fan mail from people who used the service late at night just to hear his calm voice, " says McEvoy.

BBC: Speaking Clock: Why are people still dialling for the time?