1. Insert a simcard from a different network.
2. Your LG L90 D405 should ask for an unlock code
- for Network Code type the NCK code
- for Service Provider Code input the SPCK code
Second option (device doesn't ask for an unlock code with an unaccepted SIM)
1. Start the device with an accepted simcard
2. Go to the dial screen and press 2945#*405# (the same way you enter a phone number)
Third option (accepted simcard)
1. Go to dial screen and press 2945#*71001# or 2945#*20001# as if making a call
2. when a hidden window appears enter the unlock code
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