[ 157 ]Reference information19• Should always keep the phone more than 20 cm (8 inches) from theirpacemaker when the phone is switched on;• Should not carry the phone in a breast pocket;• Should use the ear opposite the pacemaker to minimize the potentialfor interference.• If you have any reason to suspect that interference is taking place,switch off your phone immediately.HEARING AIDSSome digital wireless phones may interfere with some hearing aids. In theevent of such interference, you may want to consult your service provider.Other medical devicesOperation of any radio transmitting equipment, including cellular phones,may interfere with the functionality of inadequately protected medicaldevices. Consult a physician or the manufacturer of the medical device todetermine if it is adequately shielded from external RF energy or if youhave any questions. Switch off your phone in health care facilities whenany regulations posted in these areas instruct you to do so. Hospitals orhealth care facilities may be using equipment that could be sensitive toexternal RF energy.VehiclesRF signals may affect improperly installed or inadequately shielded electronicsystems in motor vehicles (e.g. electronic fuel injection systems, electronicanti-skid (anti-lock) braking systems, electronic speed control systems, airbag systems). Check with the manufacturer or its representative regardingyour vehicle. You should also consult the manufacturer of any equipmentthat has been added to your vehicle.Posted facilitiesSwitch your phone off in any facility where posted notices so require.