Read help info
When your phone is in standby mode, it's ready for use. Follow these instructions to go to standby mode.
Return to standby mode
No matter what you’re doing on your phone, you can return to standby mode at any time by pressing the Menu key.
Some menu items aren't closed completely when you press the Menu key. Instead they run in the background as active menu items. If you want to close a menu item completely, press Exit or Back the necessary number of times to return to standby mode.