Samsung SGH-ZX20ZKACIN - Manual (Page 168)

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Do not store or carry flammable liquids, gases or explosive materials in the same
compartment as the phone, its parts or accessories.
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For vehicles equipped with an air bag, remember that an air bag inflates with
great force. Do not place objects, including both installed or portable wireless
equipment in the area over the air bag or in the air bag deployment area. If
wireless equipment is improperly installed and the air bag inflates, serious injury
could result.
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Switch your phone off before boarding an aircraft. The use of wireless phone in
aircraft is illegal and may be dangerous to the aircraft's operation.
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Failure to observe these instructions may lead to the suspension or denial of
telephone services to the offender, or legal action, or both.
Product Performance
Getting the Most Out of Your Signal Reception
The quality of each call you make or receive depends on the signal strength in your
area. Your phone informs you of the current signal strength by displaying a number
of bars next to the signal strength icon. The more bars displayed, the stronger the
signal.
If you're inside a building, being near a window may give you better reception.
Understanding the Power Save Feature
If your phone is unable to find a signal after 15 minutes of searching, a Power Save
feature is automatically activated. If your phone is active, it periodically rechecks
service availability or you can check it yourself by pressing any key.
Anytime the Power Save feature is activated, a message displays on the screen.
When a signal is found, your phone returns to standby mode.
Understanding How Your Phone Operates
Your phone is basically a radio transmitter and receiver. When it's turned on, it
receives and transmits radio frequency (RF) signals. When you use your phone, the
system handling your call controls the power level. This power can range from 0.006
watts to 0.2 watts in digital mode.
Maintaining Your Phone's Peak Performance
For the best care of your phone, only authorized personnel should service your
phone and accessories. Faulty service may void the warranty.
There are several simple guidelines to operating your phone properly and
maintaining safe, satisfactory service.
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Hold the phone with the antenna raised, fully-extended and over your shoulder.