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the different features of your BlackBerry device thoroughly and in different

locations to determine if you hear any interfering noise when using this

BlackBerry device with your hearing aid or cochlear implant. Consult your

wireless service provider about its return and exchange policies and for

information about hearing aid compatibility.

How the ratings work

M-Ratings: Wireless devices rated M3 or M4 meet FCC requirements and

are likely to generate less interference to hearing devices than wireless

devices that are not labeled. M4 is the better or higher of the two ratings.

T-Ratings: Wireless devices 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 wireless devices. T4 is the better or

higher of the two ratings. (Note that not all hearing devices have telecoils in

them.)

Hearing devices may also be measured for immunity to this type of

interference. Your hearing device manufacturer or hearing health

professional may help you find results for your hearing device. The more

immune your hearing aid is, the less likely you are to experience

interference noise from wireless devices.

For more information about the actions that the FCC has taken with regard

to hearing aid compatibility with wireless devices and other steps that the

FCC has taken to ensure that individuals with disabilities have access to

telecommunications services, visit www.fcc.gov/cgb/dro.