HTC 0P9O300 Product Safety Manual page 13

a hearing aid's telecoil than phones that are not
rated. T4 is the better/higher of the two ratings.
Your 0P9O300 is rated T3.
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
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.
The ratings are not guarantees. Trying out the
phone with your hearing device is the best way
to evaluate it for your personal needs. Results will
vary depending on a user's hearing device and
hearing loss. For example, if some wireless phones
are used near some hearing devices, users may
detect a buzzing, humming, or whining noise.
Some hearing devices are more immune than
others to this interference noise, and phones also
vary in the amount of interference they generate.
If your hearing device happens to be vulnerable to
interference, you may not be able to use a rated
phone successfully.
using hearing aid devices with your 0P9O300.
For information about hearing aids and
digital wireless phones
 FCC Hearing Aid Compatibility and Volume
Control: http://www.fcc.gov/cgb/dro/hearing.
html
 Hearing Aid Compatibility for Wireless
Telephones: http://www.fcc.gov/guides/
hearing-aid-compatibility-wireless-telephones
Safety and regulatory guide 13