LG P700 User Manual page 199

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.
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