iam not sure if its possible to tell you the truth, because the phone is meant to be dead if theres NCK reaches 0, but some say its possible to reset it. but what i know i saw a friends phone that messed around with the NCK codes and once it reached 0, he cant get it to unlock even he paid the unlocking shop.

but as what willin said try repair the GDFS using SEtool, not XS++ for some reason SEtool works better but XS++ is easier.