open unlocktool select vivo tab,then select model vivo y12,y15 new sec patch,then select factory reset
turn off phone then insert usb cable wala na po pipindutin sa cp sak2 na lang antayin na lang matapos at sa frp same procedure po
turn off phone then insert usb cable wala na po pipindutin sa cp sak2 na lang antayin na lang matapos at sa frp same procedure po