Samsung SPH-M520ZSAQST - Manual (Page 272)

246 Section 4A: Important Safety Information
Using Your Phone With a Hearing Aid Device
Your phone has been tested for hearing aid device compatibility. When 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 ratings for some of their mobile phones, to
assist hearing device users in finding phones that may be compatible with their hearing
devices. Not all phones have been rated. Phones that have been rated have a label located
on the box.
Your M520 phone by Samsung has an M4 rating.
These ratings are not guarantees. Results will vary depending on the level of immunity of
your hearing device and 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. 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.)
The more immune your hearing aid device is, the less likely you are to experience
interference noise from your wireless phone. Hearing aid devices should have ratings
similar to phones. Ask your hearing healthcare professional for the rating of your hearing
aid. Add the rating of your hearing aid and your phone to determine probable usability:
ⅷ Any combined rating equal to or greater than six offers best use.
ⅷ Any combined rating equal to five is considered normal use.
ⅷ Any combined rating equal to four is considered usable.
Thus, if you pair an M3 hearing aid with an M3 phone, you will have a combined rating of
six for "best use." This is synonymous for T ratings.
It is suggested that you experiment with multiple phones (even those not labeled M3/T3 or
M4/T4) while in the store to find the one that works best with your hearing aid device.