Handphone
핸드폰 (original)
A talent manager loses his handphone which contains a scandalous video which could destroy his career. He is then contacted by a mysterious caller who has found the phone and blackmails him into committing a series of crimes.
Starring Uhm Tae-woong, Park Yong-woo, Park Sol-mi, Bo-yeon Hwang, Lee Se-na, Lee Seung-joon, Kim Gu-taek, Kim Koo-taek, Kim Nam-gil, Jeon Bae-soo
Watch "Handphone" on Amazon released in 2009. It's a mystery and thriller movie, and has a rating of 6.6 out of 10 from Imdb which is usually fine for this kind of movie, and is currently only available for purchase or rent.