Bellow is shown the exact method to insert the unlock codes for LG F2300

1- Switch ON your phone with non-accepted SIM card

2- Dial: 2945#*7101#

3- Go to Settings => Security => SIM lock 

4- Dial NCK unlock code and press OK

 

Need an LG F2300 unlock code,can get it for less that 3$ :Lg unlock codes