Appendix178• should always keep the phone more than 15 cm (6inches) from their pacemaker when the phone isswitched on.• should not carry the phone in a breast pocket.• should use the ear opposite the pacemaker tominimize potential interference.If you have any reason to suspect that interference istaking place, switch off your phone immediately.Hearing aidsSome digital wireless phones may interfere with somehearing aids. In the event of such interference, youmay wish to consult your hearing aid manufacturer todiscuss alternatives.Other medical devicesIf you use any other personal medical devices, consultthe manufacturer of your device to determine if it isadequately shielded from external RF energy. Yourphysician may be able to assist you in obtaining thisinformation. Switch off your phone in health carefacilities when any regulations posted in these areasinstruct you to do so. Hospitals or health care facilitiesmay be using equipment that could be sensitive toexternal RF energy.VehiclesRF signals may affect improperly installed orinadequately shielded electronic systems in motorvehicles. Check with the manufacturer or itsrepresentative regarding your vehicle. You should alsoconsult the manufacturer of any equipment that hasbeen added to your vehicle. You should also consultthe manufacturer of any equipment that has beenadded to your vehicle.Posted facilitiesSwitch off your phone in any facility where postednotices require you to do so.Potentially explosive environmentsSwitch off your phone when in any area with apotentially explosive atmosphere and obey all signsand instructions. Sparks in such areas could cause anexplosion or fire resulting in bodily injury or evendeath.Users are advised to switch off the phone while at arefueling point (service station). Users are remindedof the need to observe restrictions on the use of radioequipment in fuel depots (fuel storage and distribution