I know it might sound crazy but..I have a samsung SGH-D807 cellphone by cingular alltel. How do you turn this phone off. I always put it on vibrate but at my job I'm not allowed to do that it has to be all the way off. Can someone plz help me?

i'm not sure of the model exactly but it is usually the same way you turn it on. sometimes its the "end' button-- hold it in until it shuts down. or there is a power button that says power or a little "o" with a line though it