A520f frp done binary:4

If you have binary:4 you need:
COMBINATION_FAC_FA60_A520FXXU4ARA4 and
A520FXXU4BRA8_OXX4BRA8
from z3x support

To begin with, You need to flash combination, after that flash from normal firmware only system+sboot+boot+recovery+cache.

The phone need 5 min to boot up then only click next-next-next or swipe from up the notification bar and go to setting then to enable OEM and make hard reset

Thanks z3x team:)