• Follow the manufacturer directions for theimplanted medical device.If you have any questions about using your wirelessdevice with an implanted medical device, consult yourhealth care provider.Hearing aidsSome digital wireless devices may interfere with somehearing aids.VehiclesRF signals may affect improperly installed orinadequately shielded electronic systems in motorvehicles such as electronic fuel injection, electronicantilock braking, electronic speed control, and air bagsystems. For more information, check with themanufacturer of your vehicle or its equipment.Only qualified personnel should service the device orinstall the device in a vehicle. Faulty installation orservice may be dangerous and may invalidate yourwarranty. Check regularly that all wireless deviceequipment in your vehicle is mounted and operatingproperly. Do not store or carry flammable liquids,gases, or explosive materials in the same compartmentas the device, its parts, or accessories. Remember thatair bags inflate with great force. Do not place yourdevice or accessories in the air bag deployment area.Switch off your device before boarding an aircraft. Theuse of wireless teledevices in an aircraft may bedangerous to the operation of the aircraft and may beillegal.Potentially explosiveenvironmentsSwitch off your device in any area with a potentiallyexplosive atmosphere. Obey all posted instructions.Sparks in such areas could cause an explosion or fireresulting in bodily injury or death. Switch off the deviceat refuelling points such as near gas pumps at servicestations. Observe restrictions in fuel depots, storage,and distribution areas; chemical plants; or whereblasting operations are in progress. Areas with apotentially explosive atmosphere are often, but notalways, clearly marked. They include areas where youwould be advised to turn off your vehicle engine, belowdeck on boats, chemical transfer or storage facilitiesand where the air contains chemicals or particles suchas grain, dust, or metal powders. You should check withthe manufacturers of vehicles using liquefiedpetroleum gas (such as propane or butane) todetermine if this device can be safely used in theirvicinity.Emergency callsImportant: This device operates using radiosignals, wireless networks, landline networks, anduser-programmed functions. If your device supports 145 Additional safety information