Nokia E63 - Manual (Page 16)

Connect the headset
Warning: When you use the headset, your ability to
hear outside sounds may be affected. Do not use the headset
where it can endanger your safety.
Connect the compatible headset to the headset connector of
your device.
Attach the wrist strap
Thread the wrist strap, and tighten it.
Antennas
Your device may have internal and external antennas. Avoid
touching the antenna area unnecessarily while the antenna
is transmitting or receiving. Contact with antennas affects the
communication quality and may cause a higher power level
during operation and may reduce the battery life.
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