Cellular (2004)

Genre: Action | Crime | Thriller
Tagline: If the signal dies so does she.
Starring: Kim Basinger, Chris Evans, William H. Macy, Jason Statham, Dat Phan

Plot: A young man receives an emergency phone call on his cell phone from an older woman. The catch? The woman claims to have been kidnapped; and the kidnappers have targeted her husband and child next.

http://www.imdb.com/title/tt0337921/
http://en.wikipedia.org/wiki/Cellular_(film)