Zte Z932L Quick Start Manual page 39

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 information about FCC Hearing
Aid Compatibility, please go to http://www.fcc.gov/cgb/dro.
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