Cell Phone (simplified Chinese: 手机; traditional Chinese: 手機; pinyin: shǒujī) is a 2003 Chinese comedy-drama film directed by Feng Xiaogang and starring Ge You, Zhang Guoli, Xu Fan and Fan Bingbing. It was first released on 18 December 2003 in mainland China and was subsequently screened at the Cleveland International Film Festival on 18 March 2005. With box office earnings of over ¥50 million, Cell Phone became the highest-grossing domestic film in 2003.

Written by Liu Zhenyun, based on his novel of the same title, the film revolves around two successful men whose marriages were wrecked when their wives uncovered their extramarital affairs through traces left on their cell phones. More broadly, the film explores the role of cell phones in complex interpersonal relationships in modern China, where the rapidly expanding use of information technology impacts the way people communicate.