Lg G5 H830 Successfully Unlock with great box

first downgrade phone 30c to 20a without any problem then root it and unlock done

first try with other tool that says unlock fail but z3x unlock done in just 2 mints;)

Checking Login and Password... OK
Ballance: 30 crd.
You have 30 credit(s) left. This operation takes 10 credits.Continue? Yes
Searching modem interface... found COM41
Reading data from phone... OK
IMEI: 3567290xxxxxxxxx
Checking root rights... OK
Writing zTool... OK
SW Version: H83020a
Initialization zTool... OK
Reading data from phone... OK
Calculating... OK
Searching server... OK
Waiting for server answer... OK
Initialization zTool... OK
Reading data from phone... OK
Unlocking done
Elapsed: 131 secs. --> (v9.59)