Please help for unlock G892A

I try to unlock G892A but i cannot. I Run dialer and type *#0*# but nothing. I type *#06# again but noting appear.
I flash it with this combinaison COMBINATION_FA70_G892AUCU2ARA1 after with this file: G892AUCS2ARB1_ATT2ARB1, 7.0
and this: G892AUCS2BRE3_ATT2BRE3, 8.0 but nothing.
Please how can i do? Help