Blackberry 9330, 9300 manual How the ratings work

Consulting with your hearing health professional and testing the wireless device with your hearing device is the best way to evaluate it for your personal needs.

This BlackBerry device has been tested and rated for use with hearing aids for some of the wireless technologies that the BlackBerry device uses. However, other wireless technologies may be used in this BlackBerry device that have not been tested for use with hearing aids. It is important to try 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.

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