LG Optimus F3 Start Manual page 69

are rated have the rating on their box or a label located
on the box.
The ratings are not guarantees.
Results will vary depending on the user's hearing device
and hearing loss. If your hearing device happens to be
vulnerable to interference, you may not be able to use a
rated phone successfully.
Trying out the phone with your hearing device is the best
way to evaluate it for your personal needs.
M-Ratings: Phones rated M3 or M4 meet FCC
requirements and are likely to generate less interference
to hearing devices than phones that are not labeled. M4
is the better/higher of the two ratings.
T-Ratings: Phones rated T3 or T4 meet FCC requirements
and are likely to generate less interference to hearing
devices than phones that are not labeled. T4 is the better/
higher of the two ratings.
Hearing devices may also be rated. Your hearing device
manufacturer or hearing health professional may help
you find this rating. Higher ratings mean that the hearing
device is relatively immune to interference noise. The
hearing aid and wireless phone rating values are then
added together. A sum of 5 is considered acceptable for
normal use.
A sum of 6 is considered for best use.
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