When I put my Sim Card in the phone it just does not recognize it, the symbol of the Sim Card appears and the "x" on top. I've tried to unlock it with the method you have here, just that every time Telephony.dat delete a file it back to restart. Currently I am using the version of the software: LS980ZVC - Android version: 4.4.2
Would like to help me as I use to unlock even here in Brazil.
Ps: When I put the phone to get on GSM network, it recognizes all available in my city.