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These ratings are not guaranteed. Results will vary, depending on the level of immunity of
your hearing device and the degree of your hearing loss. If your hearing device happens to
be vulnerable to interference, you may not be able to use a rated phone successfully. Try-
ing out the phone with your hearing device is the best way to evaluate it for your personal
needs.
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 hear-
ing device manufacturer or hearing health professional may help you nd 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 disabili-
ties have access to telecommunications services, please go to www.fcc.gov/cgb/dro.
Turn on the HAC Setting
When the HAC setting is on, your ZTE-C E520 sends the audio from your phone calls to
the telecoil rather than to the microphone of your hearing aid. You are likely to hear calls
