ghost call

(名詞) 鬼電話;鬼打來的電話 -- 某人不慎撥錯或誤觸手機撥號鍵所打來的未出聲的電話。這個字亦可當動詞用,意為「打鬼電話」。
-- ghost calling (現在分詞/動名詞):打鬼電話。
-- ghost caller (名詞):打鬼電話的人。

One added problem for the emergency teams, particularly at this time of the year, is the inadvertent ghost call made on mobile phones.

Supt Bell said: "With lots of people getting new mobiles for Christmas it is important they know how to lock their keypad. It's easy when unlocked phones are in handbags or pockets to knock them and unwittingly make '999' calls.
—"Don't be a 999 ninny during the New Year," Evening Gazette, December 30, 2008

I am a priest and a woman in my church group was used to calling her husband three or four times a day or more. She is extremely jealous and basically uses the cellphone to track his movements. A while back he must have sat on his phone or something because he "ghost-called" his wife when having drinks with another woman. He was supposed to be at work.
—David Eddie, "Is having a drink with a woman cheating?," The Globe and Mail, March 6, 2009