That is not the case with, say, mobile phones, in which the telecom operator can tell which phone placed what call and to whom the phone is registered.

而这与，比如说移动电话的情况不同，电信运营商能知道谁注册的哪个手机打了哪个电话。

youdao

My buddy received a police department case number, followed up by a phone call the next day.

我的朋友收到了警察局的案件编号，第二天通过电话继续调查。

youdao

The reason I bought a mobile phone in the first place was to be able to call others in case I was stranded somewhere.

我带手机的一个首要原因就是，如果我在某处陷入困境的时候能给别人打电话寻求帮助。

youdao

The case began with a phone call from a clerk at a local Circuit City.

NPR: Trial Begins For Men Accused In Fort Dix 'Pizza Plot'

The invention that matters in this particular case is what we now call the mobile phone.

FORBES: Age of Context: Really Smart Mobile Devices

She had to wait an hour by a pay phone to find someone who wanted to use it, and in his case, it was an emergency call.

CNN: Pay phones: The search for an endangered species