LG E988 User Manual page 251

NOTE: If you have not logged into your Google Account and have forgotten
your Unlock Pattern, you will need to enter your Backup PIN.
5. Using the Hard Reset (Factory Reset)
If your phone does not restore to its original condition, use a Hard Reset (Factory Reset)
to initialize it.
1 Turn the power off.
2 Press and hold the Power/Lock key + Volume Down key.
3 LG Logo appears on the screen and After a few seconds, FACTORY HARD RESET
screen will appear, Now release all keys.
4 The phone will allow you to select the factory reset function in the Android system
recovery utility by pressing Power/Lock key .
5 Press the Power/Lock key again to confirm factory reset and your phone will be
restored to its factory settings. To cancel, press any other key.
WARNING
If you perform a Hard Reset, all user applications, user data and DRM licenses
will be deleted. Please remember to backup any important data before
performing a Hard Reset.
6. Opening and switching applications
Multi-tasking is easy with Android, you can keep more than one application running
at the same time. There is no need to quit an application before opening another one.
Use and switch between several open applications. Android manages each application,
stopping and starting them as needed to ensure that idle applications don't consume
resources unnecessarily.
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