AT&T Z812 User Manual page 108

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.
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.)
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. For more
108 For Your Safety