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 to useyour phone in a place where you are not allowed to usemobile devices, such as in an airplane and at a hospital.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 power outlet.Remove the adapter from the phone.Switch 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>.Switch off 1. Open the phone.2. Press and hold [ ].