Other important safety information, Product performance – Samsung SPH-M340DAACMU User Manual
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Health and Safety Information 86
to operate this equipment. Only use approved 
batteries, antennas and chargers. The use of any 
unauthorized accessories may be dangerous and void 
the phone warranty if said accessories cause 
damage or a defect to the phone.
Although your phone is quite sturdy, it is a complex 
piece of equipment and can be broken. Avoid 
dropping, hitting, bending or sitting on it.
Other Important Safety Information
•
Only qualified personnel should service the phone or 
install the phone in a vehicle. Faulty installation or service 
may be dangerous and may invalidate any warranty 
applicable to the device.
•
Check regularly that all wireless phone equipment in your
vehicle is mounted and operating properly.
•
Do not store or carry flammable liquids, gases or 
explosive materials in the same compartment as the 
phone, its parts or accessories.
•
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.
•
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.
•
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 
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.
Common Cents M340.book Page 86 Thursday, April 1, 2010 12:36 PM