run mrt ver3.69
select brand vivo
select model y91c
click erase frp
click start
connect phone in normal mode (power on), then power off the phone
software will detect phone automatically
wait till operation finished
select brand vivo
select model y91c
click erase frp
click start
connect phone in normal mode (power on), then power off the phone
software will detect phone automatically
wait till operation finished