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certain electronic devices against the RF
signals from your mobile phone are
shielded.
Hearing aids:
Some digital mobile phones can cause
errors with some hearing aids. If such
problems you can contact the service
provider.
Other medical devices:
Operation of radio transmitting
equipment, including cellular phones, can
interfere with the function of inadequately
shielded medical devices under certain
circumstances. If you need information
about the sufficient shielded against
external RF energy or have any
questions, consult a physician or the
manufacturer of the medical device.
Switch off your phone in health care
facilities when you are prompted by
signs, posters or other written
arrangements. Hospitals or health care
facilities, devices be used under
circumstances that could be sensitive to
external RF energy.