:rolleyes:stand by is the image or theme that is present when your phone is ready to make calls or receive, with details of operator is show in the display, the status of battery , signal from operator, date,time and others is seen on the back ground of image or theme, this is called stand by but the screen saver is one which is displayed when phone is in idle mode, there will no theme seen on display just the time or your pre setting saved image. this saves battery. all other information is not seen like in standby.:p