I've just finished watching this film and I really enjoyed it. The premise is Halle Berry is Jordan, a 911 call operator, who is good at her job but loses faith after a girl she tries to help ends up becoming the victim of a killer. She then gives up answering calls herself and instead trains new recruits.
This all changes one day when she is showing some new staff around the call centre, and happens to listen in on a call from a young girl, Casey, who has been abducted and is in the trunk of her abductor's car. From here on, the film is full on suspense, and is brilliantly done. The interaction between the two leads, despite being over the phone, is excellent, the story is fast paced and keeps you on the edge of your seat, and the ending is both unexpected and satisfying. I highly recommend this film to anyone who likes horror, thrillers, crime and suspense.
For those interested in the film's content, there is some violence but not graphic or gory, some swearing, creepy and disturbing in places, no nudity.