Huawei Y210 C Quick Start Manual page 18

While some wireless phones are used near some hearing devices (hearing
aids and cochlear implants), users may detect a buzzing, humming, or
whining noise.
Some hearing devices are more immune than others to this interference
noise, and phones also vary in the amount of interference they generate.
The wireless telephone industry has developed a rating system for wireless
phones, to assist hearing device users find phones that may be compatible
with their hearing devices. Not all phones have been rated. Phones that are
rated have the rating on their box or a label located on the box. The ratings are
not guarantees. Results will vary depending on the user's hearing device and
hearing loss. If your hearing device happens to be vulnerable to interference,
you may not be able to use a rated phone successfully. Trying 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 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.) Hearing devices may also
be measured.
Your phone meets the M4/T4 level rating. Hearing devices may also be rated.
Your hearing device manufacturer or hearing health professional may help
you find this rating.
This phone has been tested and rated for use with hearing aids for some of
the wireless technologies that it uses. However, there may be some newer
wireless technologies used in this phone that have not been tested yet for use
with hearing aids. It is important to try the different features of this phone
thoroughly and in different locations, using your hearing aid or cochlear
implant, to determine if you hear any interfering noise. Consult your service
provider or the manufacturer of this phone for information on hearing aid
compatibility. If you have questions about return or exchange policies, consult
your service provider or phone retailer.
For more information about the FCC Hearing Aid Compatibility please go to
http://transition.fcc.gov/cgb/dro/hearing.html.
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