In this video Darci Larocque of Swirl Solutions is demonstrating how to quickly switch between callers on your Blackberry. Often if you are talking to a person and someone else calls, you need not hang up the call. You can simply use the Flash feature to switch between the two calls without hanging any of them. While you are on a call , you can just click on menu and you will get a flash option. This will flip you between two callers. This is a great tip for Blackberry users.