Zte X500 Manual page 42

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. Hearing devices may also be rated. Your
hearing device manufacturer or hearing health professional may
help you find this rating. Higher ratings mean that the hearing