LG -P768 User Manual page 190

Getting to know your phone
NOTE:
Precautions to take when using
pattern lock.
It is very important to remember the
unlock pattern you set. You will not be
able to access your phone if you use
an incorrect pattern 5 times. You have
5 opportunities to enter your unlock
pattern, PIN or password. If you have
used all 5 opportunities, you can try
again after 30 seconds.
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When you cannot recall your unlock
pattern:
If you logged in to your Google account on the
phone but failed to enter the correct pattern
5 times, tap the Forgot pattern button. You
are then required to log in with your Google
account to unlock your phone.
If you have not created a Google account on
the phone or you forgot it, you have to perform
a hard reset.