Bellow is shown the exact method to insert the unlock codes for LG CU320
1- Power phone on with no SIM card
2- Dial 277634#*#
3- Go to SIM Test in Phone Test Mod.
4- Dial code 2945#*#
5- Access SIM Unlock
Need an LG CU320 unlock code,can get it for less that 3$ :Lg unlock codes