R e f e r e n c e i n f o r m a t i o n84Potentially explosive environmentsSwitch off your device when in any area with a potentially explosive atmosphere,and obey all signs and instructions. Potentially explosive atmospheres include areaswhere you would normally be advised to turn off your vehicle engine. Sparks insuch areas could cause an explosion or fire resulting in bodily injury or even death.Switch off the device at refueling points such as near gas pumps at service stations.Observe restrictions on the use of radio equipment in fuel depots, storage, anddistribution areas; chemical plants; or where blasting operations are in progress.Areas with a potentially explosive atmosphere are often, but not always, clearlymarked. They include below deck on boats, chemical transfer or storage facilities,vehicles using liquefied petroleum gas (such as propane or butane), and areaswhere the air contains chemicals or particles such as grain, dust, or metal powders.■ Emergency callsImportant: Wireless phones, including this device, operate using radiosignals, wireless networks, landline networks, and user-programmedfunctions. Because of this, connections in all conditions cannot beguaranteed. You should never rely solely on any wireless device foressential communications like medical emergencies.To make an emergency call:1. If the device is not on, switch it on. Check for adequate signal strength. Somenetworks may require that a valid SIM card is properly inserted in the device.2. Press the end key as many times as needed to clear the display, and ready thedevice for calls.3. Enter the official emergency number for your present location. Emergencynumbers vary by location.4. Press the call key.If certain features are in use, you may first need to turn those features off beforeyou can make an emergency call. Consult this guide or your service provider.When making an emergency call, give all the necessary information as accuratelyas possible. Your wireless phone may be the only means of communication at thescene of an accident. Do not end the call until given permission to do so.