Bellow is shown the exact method to insert the unlock codes for LG A340 GoPhone

 

1- Power phone on with a non-accepted SIM card

2- Phone will request to enter the network unlock code/pin

3- Insert the unlock code and press OK 

or

1. Power ON your phone with non accepted SIM card

2. Dial *2945#509#

3. Phone will request network unlock code to be entered twice

4. Device is now unlocked

or

1- Power phone on with accepted SIM card

2- Dial 2945#*71001#

3- Go to Menu => Settings => Security => Simlock

4- Dial unlock code

Need an LG A340 GoPhone unlock code,can get it for less that 3$ :Lg unlock codes