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M-Ratings:Phones rated M3 or M4 meet FCC requirements for
hearing aid compatibility and are likely to generate less
interference to hearing devices than unrated phones. (M4 is the
better/higherof the two ratings.)
T-Ratings:Phones rated T3 orT4 meet FCC requirements and are
likely to be more usable with a hearing device’s telecoil (“TSwitch”
or“Telephone Switch”) than unrated phones. (T4 is the
better/higherof the two ratings. Note that not all hearing devices
have telecoils in them.)
Hearing aid devices may also be measured forimmunity to
interference noise from wireless phones and should have ratings
similarto phones. Ask yourhearing healthcare professional forthe
rating of yourhearing aid. Add the rating of yourhearing aid and
yourphone to determine probable usability:
ⅷ
Any combined rating equal to orgreaterthan six offers
excellent use.
ⅷ
Any combined rating equal to five is considered normal
use.
ⅷ
Any combined rating equal to fouris considered usable.
Thus, if you pairan M3 hearing aid with an M3 phone, you will have
a combined rating of six for“excellent use.”This is synonymous for
Tratings.
Sprint furthersuggests you experiment with multiple phones (even
those not labeled M3/T3 or M4/T4)while in the store to find the
one that works best with yourhearing aid device. Should you
experience interference orfind the quality of service unsatisfactory
after purchasing yourphone, promptly return it to the store within
30 days of purchase. With the Sprint 30-day Risk-Free Guarantee,
you may return the phone within 30 days of purchase fora full
refund.
More information about hearing aid compatibility may be found at:
www.fcc.gov, www.fda.gov, and www.accesswireless.org.
Getting the Best Hearing Device
Experience With Your Phone
To further minimize interference:
ⅷ
Set the phone’s backlight and keypad light settings to
ensure the minimum time interval:
To change the Backlight setting:
1. Press > Settings > Display > Main Screen >
Backlight.
2. Select the minimum time interval setting and press .
To change the Keypad Light setting:
1. Press > Settings > Display > Keypad Light.
2. Select the minimum time interval setting and press .
ⅷ
Position the phone so the internal antenna is farthest from
yourhearing aid.
Section 4A. Important Safety Information 139
Important Safety
Information