metal parts may change the RF performance of
the device, including its compliance with RF
exposure guidelines, in a manner that has not
been tested or certified, and use such
accessories should be avoided.
Hearing Aid Compatibility (HAC)
regulations for Mobile phones
• Your phone is compliant with the FCC Hearing
Aid Compatibility requirements.
• The FCC has adopted HAC rules for digital
wireless phones. These rules require certain
phone to be tested and rated under the
American National Standard Institute (ANSI)
C63.19-2011 hearing aid compatibility
standards.
• The ANSI standard for hearing aid
compatibility contains two types of ratings.
• M-Ratings: Rating for less radio frequency
interference to enable acoustic coupling with
hearing aids.
• T-Ratings: Rating for inductive coupling with
hearing aids in tele-coil mode.
• Not all phones have been rated, a phone is
considered hearing aid compatible under FCC
rules if it is rated M3 or M4 for acoustic coupling
and T3 or T4 for inductive coupling. These
ratings are given on a scale from one to four,
