Samsung SCH-R915ZKACRI - Manual (Page 150)

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A sum of 5 is considered acceptable for normal use. A sum of 6
is considered for best use.
If a hearing aid meets the M2 level rating and the wireless mobile
device meets the M3 level rating, the sum of the two values
equal M5. This is synonymous for T ratings. This should provide
the hearing aid user with “normal usage” while using their
hearing aid with the particular wireless mobile device.
“Normal usage” in this context is defined as a signal quality that
is acceptable for normal operation. The M mark is intended to be
synonymous with the U mark. The T mark is intended to be
synonymous with the UT mark. The M and T marks are
recommended by the Alliance for Telecommunications Industries
Solutions (ATIS). The U and UT marks are referenced in Section
20.19 of the FCC Rules.
The HAC rating and measurement procedure are described in the
American National Standards Institute (ANSI) C63.19 standard.
HAC/Wi-Fi for Newer Technologies
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 some newer wireless technologies used in this phone
that have not been tested yet for use with hearing aids. It is
important to try the different features of this phone thoroughly
and in different locations, using your hearing aid or cochlear
implant, to determine if you hear any interfering noise. Consult
your service provider or the manufacturer of this phone for
information on hearing aid compatibility. If you have questions
about return or exchange policies, consult your service provider
or phone retailer.
Restricting Children's Access to Your
Mobile Device
Your mobile device is not a toy. Do not allow children to play with
it because they could hurt themselves and others, damage the
mobile device, or make calls that increase your mobile device
bill.
Keep the mobile device and all its parts and accessories out of
the reach of small children.
M3 + M2 = 5 T3 + T2 = 5