Radio Frequency Interference - Zte Z557BL User Manual

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The phone shall only be connected to CTIA certified adapters,
products that bear the USB-IF logo or products that have
completed the USB-IF compliance program.

Radio Frequency Interference

General Statement on Interference
Care must be taken when using the phone in close proximity to
personal medical devices, such as pacemakers and hearing aids.
Pacemakers
Pacemaker manufacturers recommend that a minimum
separation of 15 cm be maintained between a mobile phone and
a pacemaker to avoid potential interference with the pacemaker.
To achieve this, use the phone on the opposite ear to your
pacemaker and do not carry it in a breast pocket.
Hearing Aids
People with hearing aids or other cochlear implants may
experience interfering noises when using wireless devices or
when one is nearby.
The level of interference will depend on the type of hearing
device and the distance from the interference source. Increasing
the separation between them may reduce the interference. You
may also consult your hearing aid manufacturer to discuss
alternatives.
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