LG -P714 Guide De L'utilisateur page 277

NOTE: Your personal data from internal phone storage—including information
about your Google account and any other accounts, your system/application
data and settings, any downloaded applications and your DRM licence—
might be lost in the process of updating your phone's software. Therefore, LG
recommends that you back up your personal data before updating your phone's
software. LG does not take responsibility for any loss of personal data.
NOTE: This feature depends on your network service provider, region and
country.
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