LG D801 Start Manual page 74

To ensure that the Hearing Aid Compatibility rating
for your phone is maintained, secondary transmitters
such as Bluetooth and WLAN components must be
disabled during a call.
For information about hearing aids and digital wireless
phones
Wireless Phones and Hearing Aid Accessibility http://www.
accesswireless.org/
FCC Hearing Aid Compatibility and Volume Control http://
www.fcc.gov/cgb/consumerfacts/hac_wireless.html
72