NTT docomo Optimus LTE L-01D Instruction Manual page 236

PETROL STATIONS
Obey all posted signs with respect to the use of
wireless devices or other radio equipment in locations
with flammable material and chemicals. Switch off your
wireless device whenever you are instructed to do so
by authorized staff.
INTERFERENCE
Care must be taken when using the phone in close
proximity to personal medical devices, such as
pacemakers and hearing aids.
Pacemakers
Pacemaker manufacturers recommend that a minimum
separation of 15 cm be maintained between a mobile
phone and a pacemaker to avoid potential interference
with the pacemaker. To achieve this use the phone on
the opposite ear to your pacemaker and do not carry it
in a breast pocket.
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Appendix / Index
Hearing Aids
Some digital wireless phones may interfere with some
hearing aids. In the event of such interference, you
may want to consult your hearing aid manufacturer to
discuss alternatives.
NOTE: Excessive sound pressure from earphones
can cause hearing loss.
For other Medical Devices:
Please consult your physician and the device
manufacturer to determine if operation of your phone
may interfere with the operation of your medical device.