I forgot my unlock code(pin number) to unlock my sprint lg optimus

SOURCE: I forgot my keylock code for my Lg Fusic sprint cell phone

the code is the last four digits of your cell phone number

i had the same problem and it worked

SOURCE: Unlock my Sprint LG Lotus Phone if i forgot my lock password

As long as you know your security code you can retreive your lock code. On the Lotus dial ##3282# scroll down to Advanced, choose View, then scroll down to option 5 which should be the Lock Code and select it. You will need to enter your security code here which typically is 6 zeros.

SOURCE: I have a lg optimus

sir if you forgot the password or don't know the security code, You have to master reset the phone. Contact your service provider to get a master reset code at free of cost....You can also visit http://www.unlock-zone.com/ and can see different options there to get unlock code for a price. Choose any price appropriate for you.................

SOURCE: I Forgot my 4 digit

You would not be able to unlock or remove it, if you type it in wrong enough it should master reset the phone and once back on sync your email back up to retrieve your contacts, you would then be able to set a code you remember.
If this does not work you would need to contact LG directly.

SOURCE: Trying to enter my unlock

Most phones the security code is the last four digits of your cell phone number. If that's not it, try dialing *288 and pressing 1 when promted. This will reset your phone and then the security code should be the last four digits of the phone number. This is at least the case with MOST cell phones. If not, bring it to the nearest store location of your phone provider and they can reset it
Hope this helps
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- Frankie