LG nexus 5 Important Information Manual page 6

wireless phone and hearing devices to determine usability rating
categories for both.
Ratings have been developed for mobile phones to assist hearing
device users find phones that may be compatible with their hearing
device. Not all phones have been rated for compatibility with hearing
devices. Phones that have been rated have a label located on the
box. Your nexus5 has an M3 rating.
These ratings are not guarantees. Results will vary depending
on the user's hearing device and individual type and degree
of hearing loss. If a hearing device is particularly vulnerable to
interference noise; even a phone with a higher rating may still cause
unacceptable noise levels in the hearing device. 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 for
hearing aid compatibility and are likely to generate less interference
to hearing devices than unrated phones. (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.)
Note:
New Technologies, Including Wi-Fi
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 newer wireless technologies
(including Wi-Fi) used in this phone that have not been tested
for use with hearing aids.
Hearing aid devices may also be measured for immunity to
interference noise from wireless phones and should have ratings
6 Important Safety Information