If your order comes back as "NOT FOUND" try the LG Database 2 service.
This LG unlocking service is for any AT&T LG phones and tablets, including:
G Pad F, G Pad X, Flex2, G4, G2, Xpression 2, V10, Vista, Escape2 and others.
Do not submit non-AT&T IMEIs here.
*** NO REFUNDS WILL BE GIVEN FOR NON-AT&T IMEIs ***
To unlock your LG device simply insert a foreign SIM card into your phone and enter the SIM_UNLOCK(NCK) OR SP_LOCK(SPCK) unlock code.
Once you enter the unlock code your phone will be permanently unlocked and ready to accept any compatible SIM card.
If your phone does not prompt for unlock code, use the following instructions:
Dial 2945#*MODEL NUMBER#
If your phone is LG MS323, the model number is 323.
You must dial 2945#*323#. You'll see a menu with 5 options:
Select: UNLOCK or UNLOCK 2 and Enter the SIM_UNLOCK(NCK) code provided.
NETWORK LOCK UNLOCK
SERVICE PROVIDER LOCK - UNLOCK 2
NETWORKSUBSET LOCK - NONE
CORPORATE LOCK - NONE
SIM/USIM LOCK - NONE
IMPORTANT: Use the NCK code provided only.