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and are likely to generate less interference to hearing
devices than phones that are not labeled. M4 is the
better/higher of the two ratings.
T-Ratings: Phones rated T3 or T4 meet FCC requirements
and are likely to be more usable with a hearing device’s
telecoil (“T Switch” or “Telephone Switch”) than unrated
phones. T4 is the better/ higher of the two ratings. (Note that
not all hearing devices have telecoils in them.)
Your phone meets the M3/T4 level rating.
Hearing devices may also be rated. Your hearing device
manufacturer or hearing health professional may help you
find this rating. For more information about FCC Hearing Aid
Compatibility, please go to http://www.fcc.gov/cgb/dro.
CTIA Requirements
Do not disassemble or open crush, bend or deform, puncture
or shred
Do not modify or remanufacture, attempt to insert foreign
objects into the battery, immerse or expose to water or other
liquids, expose to fire, explosion or other hazard.
Only use the battery for the system for which it is specified
Only use the battery with a charging system that has been
qualified with the system per CTIA Certification Requirements
for Battery System Compliance to IEEE 1725. Use of an
unqualified battery or charger may present a risk of fire,
explosion, leakage, or other hazard.
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