Trailers of Similar Films

There are a few films that are similar to our idea. The main one being 'Phone Booth'. 'Phone Booth' is filmed in one location and is based around a man that gets an anonymous phone call from a public phone box from a man threatening to shoot him. Our film is similar to this as it will mostly be filmed at one location and will feature an anonymous phone call, where a man is threatening to kill the person in the phone box.
Panic Room is also a similar film to our idea, as it is also filmed at one main location. Also it follows the same basic idea, where there is a villain that is trying to persuade or steal an item which is valuable to them from the protagonist.