A:Answer To enable/disable the Hearing aids setting - Touch Phone > Menu Image > Settings > Accessibility > Hearing aids
To adjust the call volume - During a call, press the side volume keys to set a call volume that works for you
Position - During a call, hold the phone to your ear as normal, and the rotate/move it to get the best position for speaking and listening.
It is FCC M4/T$4 rated
For more in: https://support.motorola.com/us/en/Solution/MS151309