Note: You have 5 opportunities to enter your unlock Pattern,
PIN or Password. If you've entered the wrong
information 5 times, you will need to wait 30 seconds
before you can attempt again.
When you can’t recall your unlock Pattern, PIN or
- 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 user
name and password.
- If you haven’t created a Google account on the
device, you will need to perform a factory reset.
(CAUTION! If you perform a factory reset, all user
applications and user data will be deleted. Please
remember to back up any important data before
performing a factory reset.)
1. Turn the power off.
2. Press and hold the following keys for over 5 seconds:
Down volume key + + .
3. When the power turns on, release these keys.
If you can't recall your unlock PIN or Password:
Call Sprint Customer Service at 1-888-211-4727.
I was looking for something else and found this (relates to Optimus T, but should work for you, just replace S for T):
I have another method for you. This method is quite simple and you can easily access the lock password code for your LG phone. Well what you have to do is have a talk with the LG Optimus T phone carrier’s support line. They will be able to provide the unlock code for your phone. Report them that you don’t know your password to unlock the phone. They will ask for the IMEI number of your phone. You have to provide them the IMEI number. In case you dont know the IMEI number then you will get it by typing *#06#. Once they get the IMEI number of your phone they will calculate the unlock code of the phone accordingly. So go ahead with this suggestion it will definitely help you.
There are a couple other ideas at that link, but I suspect this is the best bet.
PS. Only thing I'm not sure of is how you enter that number if the phone is locked, or maybe that works in the password field?
So I guess this does not apply to CDMA phone, only GSM... But I did see this in the "flashing lights" thread (in this forum):
"First, turn the phone off. Then boot up in recovery. I think the combination is Volume Up, Home, and Power simultaneously. Use the volume rocker to get to the reset option, and then press the menu button to select it."