LG -P720 Quick Reference Manual page 210

Important notice
3. Before installing an open
source application and OS
WARNING
I f you install and use an OS other than
the one provided by the manufacturer it
may cause your phone to malfunction.
In addition, your phone will no longer be
covered by the warranty.
WARNING
T o protect your phone and personal
data, only download applications from
trusted sources, such as Android
Market™. If there are improperly
installed applications on your phone, it
may not work normally or a serious error
may occur. You must uninstall those
applications and all associated data and
settings from the phone.
10
4. Using the hard reset (Factory
reset)
If your phone does not restore to the original
condition, use a Hard Reset (Factory Reset)
to initialise it.
1 Turn the power off.
2 Press and hold the 3D key + Volume
Down key simultaneously and press the
Power/Lock key.
3 Once LG Logo appears on the screen,
release all Keys.
4
After some seconds, allow you to select
factory reset fuction in the Android
system recovery utility.
5 Scroll the list by Volume keys and
select it by 3D key.
WARNING
If you perform a Hard Reset, all user
applications, user data and DRM licenses
will be deleted. Please remember to back
up any important data before performing
a Hard Reset.