i post for new user mostly
where everything described clearly
1.need root must
to root this phone
first install twrp recovery on phone
by odin v3.10
then copy the super su to internal memory of phone
then go to recovery
then install from sd card
then select super su file
power on phone
open kingo root to check root status
root success
this time must trick allow button in phone when prompt a window
2.unlocking by octopus
read info
unlock done