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out the phone with your hearing device is the best way to 
evaluate it for your personal needs.

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/higher of the two ratings.)

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.)

Hearing aid devices may also be measured for immunity to 
interference noise from wireless phones and should have 
ratings similar to phones. Ask your hearing healthcare 
professional for the rating of your hearing aid. Add the rating of 
your hearing aid and your device to determine probable 
usability:

䢇

Any combined rating equal to or greater than six offers 
excellent use.

䢇

Any combined rating equal to five is considered normal use.

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Any combined rating equal to four is considered usable.

Thus, if you pair an M3 hearing aid with an M3 phone, you will 
have a combined rating of six for “excellent use.” This is 
synonymous for T ratings.

Sprint further suggests 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 your hearing aid device. 
Should you experience interference or find the quality of 
service unsatisfactory after purchasing your device, promptly 
return it to the store within 30 days of purchase. (A restocking 
fee may be applied to exchanges. Visit 

www.sprint.com/returns

 

for details.) More information about hearing aid compatibility 
may be found at: 

www.fcc.gov

, 

www.fda.gov

, and 

www.accesswireless.org

.

To further minimize interference:

䢇

Set the device’s screen timeout setting to ensure the 
minimum time interval:

1.

Press 

Home 

 > Menu 

 > Settings 

 > Display > 

Screen timeout

.

2.

Tap the minimum time interval setting (15 seconds).

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Position the device so the internal antennas are farthest from 
your hearing aid.

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Move the device around to find the point with least 
interference.

New Technologies, Including Wi-Fi

 



This device has been tested and rated for use with hearing 
aids for some of the wireless technologies that it uses. However, 
there may be newer wireless technologies (including Wi-Fi) 
used in this phone that have not been tested for use with 
hearing aids.