70 - Warnings and precautions• Not carry the device near your pacemaker when the device isswitched on. If you suspect interference, switch off your device, andmove it.Hearing aids. Some digital wireless devices may interfere with somehearing aids. If interference occurs, consult your service provider.VehiclesRF signals may affect improperly installed or inadequately shieldedelectronic systems in motor vehicles such as electronic fuel injectionsystems, electronic anti-skid (anti-lock) braking systems, electronicspeed control systems, and air bag systems. For more information,check with the manufacturer, or its representative, of your vehicle orany equipment that has been added. Only qualified personnel shouldservice the device, or install the device in a vehicle. Faulty installationor service may be dangerous and may invalidate any warranty thatmay apply to the device. Check regularly that all wireless equipmentin your vehicle is mounted and operating properly. Do not store orcarry flammable liquids, gases, or explosive materials in the samecompartment as the device, its parts, or enhancements. For vehiclesequipped with an air bag, remember that air bags inflate with greatforce. Do not place objects, including installed or portable wirelessequipment in the area over the air bag or in the air bag deploymentarea. If in-vehicle wireless equipment is improperly installed, and theair bag inflates, serious injury could result. Using your device whileflying in aircraft is prohibited. Switch off your device before boardingan aircraft. The use of wireless teledevices in an aircraft may bedangerous to the operation of the aircraft, disrupt the wirelesstelephone network, and may be illegal.Potentially explosive environmentsSwitch off your device when in any area with a potentially explosiveatmosphere and obey all signs and instructions. Potentially explosiveatmospheres include areas where you would normally be advised toturn off your vehicle engine. Sparks in such areas could cause anexplosion or fire resulting in bodily injury or even death. Switch off thedevice at refueling points such as near gas pumps at service stations.Observe restrictions on the use of radio equipment in fuel depots,