61■ Medical devicesOperation of any radio transmitting equipment, including wireless phones, may interferewith the functionality of inadequately protected medical devices. Consult a physician or themanufacturer of the medical device to determine if they are adequately shielded fromexternal RF energy or if you have any questions. Switch off your device in health carefacilities when any regulations posted in these areas instruct you to do so. Hospitals orhealth care facilities may be using equipment that could be sensitive to external RF energy.Implanted medical devicesManufacturers of medical devices recommend that a minimum separation of15.3 centimeters (6 inches) should be maintained between a wireless device and animplanted medical device, such as a pacemaker or implanted cardioverter defibrillator toavoid potential interference with the medical device. Persons who have such devices should:• Always keep the wireless device more than 15.3 centimeters (6 inches) from the medicaldevice when the wireless device is turned on• Do not carry the wireless device in a breast pocket• Hold the wireless device to the ear opposite the medical device to minimize the potentialfor interference.• Turn the wireless device off immediately if there is any reason to suspect thatinterference is taking place.• Read and follow the directions from the manufacturer of their implanted medical device.If you have any questions about using your wireless device with an implanted medicaldevice, consult your health care provider.Hearing aidsSome digital wireless devices may interfere with some hearing aids. If interference occurs,consult your service provider.■ VehiclesRF signals may affect improperly installed or inadequately shielded electronic systems inmotor vehicles such as electronic fuel injection systems, electronic antiskid (antilock)braking systems, electronic speed control systems, and air bag systems. For moreinformation, check with the manufacturer or its representative of your vehicle or anyequipment that has been added.Only qualified personnel should service the device, or install the device in a vehicle. Faultyinstallation or service may be dangerous and may invalidate any warranty that may apply tothe device. Check regularly that all wireless device equipment in your vehicle is mountedand operating properly. Do not store or carry flammable liquids, gases, or explosive materialsin the same compartment as the device, its parts, or enhancements. For vehicles equippedwith an air bag, remember that air bags inflate with great force. Do not place objects,including installed or portable wireless equipment in the area over the air bag or in the air