LG G4 User Manual page 20

When using the phone in public places, you may set the ringer on vibrate to avoid
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disturbing others.
Do not switch the phone on/off while it is in your ear.
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Repairs under warranty, at LG's discretion, may include replacement parts or
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boards that are either new or reconditioned, provided that they have functionality
equal to that of the parts being replaced.
Ambient temperatures
Use your phone in temperatures between 0 ºC and 40 ºC, if possible.
Exposing your phone to extremely low or high temperatures may result in
damage, malfunction, or even explosion.
Open Source Software Notice Information
To obtain the source code under GPL, LGPL, MPL, and other open source
licenses, that is contained in this product, please visit http://opensource.lge.
com.
In addition to the source code, all referred license terms, warranty disclaimers
and copyright notices are available for download.
LG Electronics will also provide open source code to you on CD-ROM for a
charge covering the cost of performing such distribution (such as the cost of
media, shipping, and handling) upon email request to opensource@lge.com.
This offer is valid for three (3) years from the date on which you purchased the
product.
HOW TO UPDATE YOUR DEVICE
Access to latest firmware releases, new software functions and improvements.
Select the software update in settings menu on your device.
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Update your device by connecting it to your PC. For more information
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about using this function, please visit http://www.lg.com/common/index.jsp
select country and language.
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Safety instructions