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M-Ratings: Phones rated M3 or M4 meet FCC requirements
and are likely to generate less interference with 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 contain telecoils.) The more immune your hearing aid
device is, the less likely you are to experience interference
noise from your wireless phone.
Hearing devices may also be measured for immunity to this
type of interference. Your hearing device manufacturer or
hearing health professional may help you find results for your
hearing device.
For additional information about the FCC's actions with regard
to hearing aid compatible wireless devices and other steps the
FCC has taken to ensure that individuals with disabilities have
access to telecommunications services, please go to
www.fcc.gov/cgb/dro.
Turning on the HAC Setting
To turn on the HAC function, touch the Home Key > Menu Key
> System settings > Call and tick the Hearing aids check box.
For detailed information, refer to “Using Your Phone With a
Hearing Aid Device” on page 171.
