LG LS855 - Manual (Page 80)

Device Settings 70
 If you have set up an Unlock Pattern (see Your Device's Lock Feature ), use your
fingertip to draw the pattern.
 If you have set up Unlock PIN or Unlock Password, enter the Unlock PIN or Unlock
Password. After entering it, tap . The last screen you were working on opens.
Note: You have five opportunities to enter your unlock Pattern, PIN or Password. If you've
entered the wrong information five times, you must wait 30 seconds before you can
attempt again.
 If you‘ve set up a Google account on the device, tap the Forgot pattern? button.
You will be able to unlock the device with your Google account username and
password.
 If you haven‘t created a Google account on the device, you must perform a factory
reset.