REFERENCE vivo y91c,y91i or1820 passcode /frp

[batosai]

to identify unit
plug usb in pc....
sa akin is vivo 1820

then turn off boot to recovery (power off phone)
recovery = volume up + power btn
select recovery
select advance option
select boot wit adb

phone reboot

plug and let pc install driver or install it manually,
after installation, turn off phone

open mrt
select vivo tab
select y91c

connect turn off unit in pc, wait untill finish

same as frp

 

[wowie]

to identify unit
plug usb in pc....
sa akin is vivo 1820

then turn off boot to recovery (power off phone)
recovery = volume up + power btn
select recovery
select advance option
select boot wit adb

phone reboot

plug and let pc install driver or install it manually,
after installation, turn off phone

open mrt
select vivo tab
select y91c

connect turn off unit in pc, wait untill finish

same as frp

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