Sonim XP7700 User Manual page 11

A combination of M-rating and T-rating defines the
final HAC rating and is a deciding factor in selecting
cellular phones for people with hearing problems. A HAC
compliant phone could be rated:
• M3/T3
• M3/T4
• M4/T3
• M4/T4
These ratings assist hearing device users to find
phones that are compatible with their hearing devices.
Ratings are shown on the phone's box or label. The
ratings are not guaranteed for suitability. The results
vary depending on the individual's hearing loss and the
immunity characteristics of the used hearing device, i.e.
its resistance to interference. The best way to evaluate
the suitability of the phone is to try it with the intended
hearing aid device.
Sonim XP7700 have been tested for hearing aid
device compatibility and complies with the Federal
Communications Commission (FCC) requirements.
These devices are rated M4/T4.
Avoid High Temperatures
Leaving the device in hot or cold places, such as in a
closed car in summer or winter conditions, reduces the
capacity and lifetime of the battery. For the best results,
try to use the device between -20°C and +55°C (-4°F
and 131°F). A device with a hot or cold battery may
not work temporarily, even when the battery is fully
charged. Battery performance is particularly limited in
temperatures well below freezing.
Personal Medical Devices
Mobile phones may affect the operation of cardiac
pacemakers and other implanted equipment. Please
avoid placing the mobile phone over the pacemaker, for
example in your breast pocket. When using the mobile
phone, place it at the ear opposite the pacemaker. If a
minimum distance of 15 cm (6 inches) is kept between
the mobile phone and the pacemaker, the risk of
interference is limited. If you suspect that interference
is taking place, immediately turn off your mobile phone.
Contact your cardiologist for more information. For
other medical devices, consult your physician and the
manufacturer of the device. Comply with instructions to
switch off the device or deactivate the RF transmitter
when required, especially when posted in hospitals and
aeroplanes. Equipment used in these places may be
sensitive to radio waves emitted from the device and
adversely affect their operation. Also, observe restrictions
at gas stations or other areas with flammable atmosphere
or when close to electro-explosive devices.
Child Safety
Do not allow children to play with your mobile phone or
its accessories. Keep it out of their reach. They could
hurt themselves or others, or could accidentally damage
the mobile phone or accessories. Your mobile phone and
its accessories may contain small parts, which could be
detached and create a choking hazard.
Emergency Calls
Mobile phones operate using radio signals, which cannot
guarantee connection under all conditions. Therefore
you should never rely solely upon any mobile phone for
essential communications (e.g. medical emergencies).
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