Additional safety information146Additional safety informationOperating environmentRemember to follow any special regulations in force in anyarea and always switch off your device when its use isprohibited or when it may cause interference or danger. Usethe device only in its normal operating positions. To maintaincompliance with radio frequency exposure guidelines only useenhancements approved by Nokia for use with this device.When the device is on and being worn on the body, alwaysuse an approved holder or carrying case.Medical devicesOperation of any radio transmitting equipment, includingwireless phones, may interfere with the functionality ofinadequately protected medical devices. Consult a physicianor the manufacturer of the medical device to determine ifthey are adequately shielded from external RF energy or if youhave any questions. Switch off your device in health carefacilities when any regulations posted in these areas instructyou to do so. Hospitals or health care facilities may be usingequipment that could be sensitive to external RF energy.PacemakersPacemaker manufacturers recommend that a minimumseparation of 6 in. (15.3 cm) be maintained between a wirelessphone and a pacemaker to avoid potential interference withthe pacemaker. These recommendations are consistent withthe independent research by and recommendations ofWireless Technology Research. Persons with pacemakersshould:• always keep the device more than 6 in. (15.3 cm) from theirpacemaker when the device is switched on;• not carry the device in a breast pocket; and• hold the device to the ear opposite the pacemaker tominimise the potential for interference.If you have any reason to suspect that interference is takingplace, switch off your device immediately.Hearing aidsSome digital wireless devices may interfere with some hearingaids. If interference occurs, consult your service provider.