Movies and TvShows featuring "cellular" theme.

In 2012, three friends got together for a college assignment in a beach house. There was some sort of paranormal activity. What happened that day was recorded in their phones, but it wasn't authorized to be shown publically. Until now.

Amid a string of hideous homicides, a housemaid heads to the isolated home of her eccentric new client who has a long set of unbreakable rules. What could possibly be hiding a solitary man with a taste for fish, and a collection of knives?