I had no idea if it was his, if it was stolen or if he even knew what a cell phone was.

我不知道那手机是他的还是偷来的，或许他干脆不知道什么是手机。

youdao

What makes a cell phone conversation that you overhear so distracting?

是什么令无意听到的电话交谈让我们分心？

youdao

Each time you make a cell-phone call, your network provider knows whom you're calling, for how long, and what device you're using.

你每一次使用手机通话时，通信服务运营商都会知晓你的通话对方、通话时长和手机型号。

youdao

No mystery about what it's like to be a cell phone.

作为手机也一样。

耶鲁公开课 - 死亡课程节选

This difficult task would be tantamount to trying to decide what cell phone to get when Option A costs a certain amount except for calls made between 9:30 a.m. and 4:30 p.m.

FORBES: The CARD Act's Winners and Losers

What if every second line in the country is a cell phone -- and if people do a lot of their long distance calling on the second line?

FORBES: Cut the cord

Some details as to Martin's thought process around that time may someday be gleaned from what he told his girlfriend back in Miami in a cell phone conversation, his family's lawyers said.

CNN: What happened the night Trayvon Martin died