Is his mobile phone turned off during times you normally can reach him, or does he claim not to have had any cell service for hours at a time?

他的手机会不会在你常联系他的时候关机或者不在服务区？

youdao

Even when turned off, things like hairdryers, cell phone chargers and televisions use energy.

即使关了机，例如吹风机、机充电器及电视都仍在使用能源。

youdao

I turned off my cell phone and put it in a drawer.

我关掉手机，把它放在一个抽屉里。

youdao

One Saturday that did not fall in either tax season (January 1 to April 15) or second tax season (August 1 to October 15), I was either out of cell phone range or had the phone turned off.

FORBES: Cell Phone as Working Condition Fringe

Even early this morning, a New York-bound flight from London turned around in midair after a cell phone went off on the plane.

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