Turning Treo on and off :: 15Turning Treo on and offYou can use the Palm OS ® features of your Treo 600 smartphone independently ofthe wireless features and applications. Therefore, the screen and Wireless Mode aredesigned to be turned off and on separately.Turning the screen on and off1. Press the Screen button to turn on the screen.2. Briefly press the Screen button to turn off the screen.Turning Wireless Mode on and offWireless Mode allows your Treo to connect to your wireless service provider’s networkso that you can make and receive phone calls and use other wireless services.1. Press and hold the Wireless Mode button to turn on Wireless Mode. You willhear a series of ascending tones. When Wireless Mode is on, your Treo connects toa wireless network, and you can use the phone and Internet features (if supportedby the local network).2. Press and hold the Wireless Mode button again to turn off Wireless Mode. Youwill hear a series of descending tones. When Wireless Mode is off, your Treo is notconnected to your wireless service provider’s network. You can still use theorganizer and other Palm OS features. This is ideal for airplane flights and formaximizing battery life.Treo includes a keyboardbacklight for nighttime use.The keyboard backlightactivates automaticallywhen the screen turns on,but shuts off if thekeyboard is not in use.When the screen is on,press Option, and then P tomanually activate thekeyboard backlight.