8Get startedLow battery indicatorWhen the battery is low:• a warning tone sounds,• the battery low message displays, and• the empty battery icon blinks.If the battery level becomes too low, the phoneautomatically turns off. Recharge your battery.Power on or offOffline modeYou can switch the phone to Offline mode, in which thephone functions requiring network connection aredeactivated. This mode is helpful when you want touse your phone in a place where you are not allowedto use mobile devices, such as in an airplane and at ahospital.To switch to Offline mode, press <Menu> and selectSettings → Phone settings → Offline mode → On.In Offline mode, you can use non-wireless functions,such as games, calendar, camera, and music player.When the phone is completely charged (thebattery icon becomes still), unplug the adapterfrom the wall outlet.Remove the adapter from the phone.Power onDo not turn onthe phone whenmobile phoneuse is prohibited.1. Open the phone.2. Press and hold [ ].3. If necessary, enter the PIN andpress <OK>.Power off 1. Open the phone.2. Press and hold [ ].