34Using your device while flying in aircraft is prohibited. Switch off your device before boardingan aircraft. The use of wireless teledevices in an aircraft may be dangerous to the operationof the aircraft, disrupt the wireless telephone network, and may be illegal.■ Potentially explosive environmentsSwitch off your device when in any area with a potentially explosive atmosphere, and obeyall signs and instructions. Potentially explosive atmospheres include areas where you wouldnormally be advised to turn off your vehicle engine. Sparks in such areas could cause anexplosion or fire resulting in bodily injury or even death. Switch off the device at refuelingpoints such as near gas pumps at service stations. Observe restrictions on the use of radioequipment in fuel depots, storage, and distribution areas; chemical plants; or where blastingoperations are in progress. Areas with a potentially explosive atmosphere are often, but notalways, clearly marked. They include below deck on boats, chemical transfer or storagefacilities, 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 radio signals,wireless networks, landline networks, and user-programmed functions. Because ofthis, connections in all conditions cannot be guaranteed. You should never relysolely on any wireless device for essential communications like medical emergencies.To make an emergency call:1. If the device is not on, switch it on. Check for adequate signal strength.Some networks 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 the devicefor calls.3. Enter the official emergency number for your present location. Emergency numbersvary by location.4. Press the call key.If certain features are in use, you may first need to turn those features off before you canmake an emergency call. Consult this guide or your service provider for more information.When making an emergency call, give all the necessary information as accurately as possible.Your wireless device may be the only means of communication at the scene of an accident.Do not end the call until given permission to do so.