Motorola i870 User Manual page 71

Approximate telecoil location is
within 6-13 mm of this location.
Approximate telecoil location,
check hearing aid user guide
for specific location.
Optimize Your Handset Orientation for Telecoil
Slide your phone up and down, left and right, then
rotate for the best coupling alignment of the telecoil
in the hearing aid with the telecoil in the phone.
Off - Shut off
M - Microphone
T - Telecoil
Features for the Hearing Impaired
59