A) HOW IT WORKS
The LG device may require several different types of unlock code. It depends on the type of lock the phone has on it. Fortunately, there is no need to worry about the hardlock - there is unlimited number of unlock attempts.
Note: If Phone says, "Code Accepted" or "Network Unlock Successful" or "Not Yet Personalized" your phone is 100% Unlocked
Before the order: http://forum.updato.com/d/191-what-you-should-check-before-you-order-phone-unlock-code
ONCE YOU HAVE A CODE
- Insert a SIM card from a different network than it is locked to
- Your LG device should ask for the unlock code
- for Network PIN type the network unlock code - NCK code
- for Service provider PIN enter the service provider unlock code - SPCK code
Another way in case the phone does not ask for the unlock code (SIM network unlock PIN) with any active unsupported SIM inserted
Insert the supported SIM card (from the network it is locked to now) and dial 2945#*model number# (find the model number is usually 3 digits long and it is available in phone Settings>About)
With any active supported SIM card (from the network it is locked to) press 2945#71001# or 2945#20001# as if you make a call. A hidden menu appears and you will be able to enter the code
The device uses the Device Unlock app - it cannot be unlocked by any code - you need to use a special service and once unlocked follow the instructions of the app.
In a few cases the above instructions do not work. You need to find out the way how to enter the code before you place your order. Usually there is no refund provided in case you cannot use the code.