Bellow is shown the exact method to insert the unlock codes for LG CU500 /CU500V
1 - Insert SIM Card from a unsupported network provider,
2 - Power on the handset,
3 - Phone will display "Invalid SmartChip"
4 - In Idle screen, enter : 159753#*#
5 - Phone will display "Enter NCK, Remaining 5"
6 - Enter the 8 digit SIM Unlock code
7 - Select "OK"
8 - The handset is now successfully unlocked
Need an LG CU500 /CU500V unlock code,can get it for less that 3$ :Lg unlock codes