Huawei Mobile Phones User Manual page 25

(Note that not all hearing devices have telecoils in them.) Hearing devices
may also be measured.
Your phone meets the M4/T4 level rating. Hearing devices may also be
rated. Your hearing device manufacturer or hearing health professional
may help you find this rating. 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 is important
to try the different features of this phone thoroughly and in different
locations, using 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.
For more information about the FCC Hearing Aid Compatibility please go to
http://transition.fcc.gov/cgb/dro/hearing.html
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