TCL 10L Manual page 18

Hearing aid compatibility rating for this smartphone: M4/T3.
How the ratings work
M-Ratings: Wireless devices rated M3 or M4 meet FCC requirements
and are likely to generate less interference to hearing devices than
wireless devices that are not labeled. M4 is the better or higher of
the two ratings.
T-Ratings: Wireless devices 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 wireless devices. T4
is the better or higher of the two ratings. (Note that not all hearing
devices have telecoils in them.)
Hearing devices may also be measured for immunity to this type of
interference. Your hearing device manufacturer or hearing health
professional may help you find results for your hearing device.
The more immune your hearing aid is, the less likely you are to
experience interference noise from wireless devices.
For more information about the actions that the FCC has taken
with regard to hearing aid compatibility with wireless devices and
other steps that the FCC has taken to ensure that individuals with
disabilities have access to telecommunications services, visit www.
fcc.gov/cgb/dro.
FCC ID: 2ACCJN036
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