REFERENCE Y66 2016CP6709 VIVO password with backup nckqualcom TESTED

[fix_solution]

password problem
open nck box qualcom
factory reset (vivo reset,keep data)
click factory reset
phone must be off
hold volume up and down
connect usb
wait 5-10 minutes (phone seems hang on logo)
done

ito po yung good backup ng unit
just dl it here...
Y66 VIVO 2016CP6709 NCKBOX QUALCOM TESTED

sana makatulong