Here are some comments from BBFC about the movie. THIS CONTAIN SPOILERS FOR THE MOVIE!
Note: The following text may contain spoilers
CELL is a science fiction horror film, based on a Stephen King novel, about a mysterious outbreak of violent madness that affects anyone with a mobile phone.
The film contains strong bloody violence. In one early sequence a large group of people are infected simultaneously and there is sight of them attacking and killing numerous people, with victims being stabbed and shot. During the sequence, there is also sight of a woman being repeatedly punched in the face by an infected man, with blood streaming from her mouth. In another scene, a large horde of infected people are set on fire and shown screaming and running to escape the blaze. The film also contains several scenes in which infected people are shot.
There are some gory images when the infected people are killed. For example, there is sight of blood oozing from a head wound after an attack, and a scene in which an infected woman repeatedly bashes her head against a wall in a frenzy before turning round and drooling blood and a tooth out of her mouth. Throughout the film there is also sight of bloody scars and injuries on the bodies and faces of the infected.
The film contains strong language ('f**k'), some of which is used aggressively.
In one sequence, a man sees a woman kneeling in front of a man in a toilet cubicle, implying sexual activity. No clear detail is shown, however, and the implied activity is revealed to have been just a dream. There are also passing references to drug use.
Thanks to Dimitris Tso