LG K4 LTE User Manual page 130

Safety
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When using the power plug, ensure that it's firmly connected. If not, it
may cause excessive heat or fire.
If you put your phone in a pocket or bag without covering the receptacle
of the phone (power plug pin), metallic articles (such as a coin, paperclip
or pen) may short-circuit the phone and may cause an explosion. Always
cover the receptacle when not in use.
General Notice
Do not place items containing magnetic components such as a credit
card, phone card, bank book, or subway ticket near your phone. The
magnetism of the phone may damage the data stored in the magnetic
strip.
Talking on your phone for a long period of time may reduce call quality
due to heat generated during use.
When the phone is not used for a long period time, store it in a safe place
with the power cord unplugged.
Using the phone in proximity to receiving equipment (i.e., TV or radio)
may cause interference to the phone.
Do not immerse your phone in water, liquid, or expose to high humidity. If
the phone is expose to liquid, turn it off immediately and bring it to an LG
Authorized Service Center.
Do not paint your phone.
The data saved in your phone might be deleted due to careless use,
repair of the phone, or upgrade of the software. Please backup your
important phone numbers (Ringtones, text messages, voice messages,
pictures, and videos could also be deleted.) The manufacturer is not liable
for damage due to the loss of data.
When you use the phone in public places, set the ringtone to vibration so
you don't disturb others.
Do not turn your phone on or off when putting it to your ear.
Use accessories, such as earphones and headsets, with caution. Ensure
that cables are tucked away safely.