Take a look at the second post of this thread: Desprotección DRM de mapas y tarjeta SD In version 20.004 and earlier AMK.LMF file doesn't work. It's necessary to replace LgeDRMKey.exe located at \MMCMemory\Storage Card\System\ by another one from a more recent version. It's tested and confirmed that the executable from 20.112 is compatible so it's available to download in that post. Just go to windows and «replace» that program. Then reboot. AMK.LMF will be functional.