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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 M4/T3 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
a) Do not disassemble or open crush, bend or deform,
puncture or shred.
b) 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.
c) Only use the battery for the system for which it is specified.
d) 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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