Vivo Y91,Y91i,Y91C,Y83 Pro,Y85,Y81 Pin/Password/Pattern Unlock (Just 3 Sec),FRP Unlock

1. Turn off your phone and remove battery,       Frist.
2. Select device which you want to unlock and click 'Start'.
3. Re-insert battery and hold down Vol -.
4. Connect your phone via USB cable, when it shows you 'Waitting for device'.

File Information: 

File Name:        Vivo Xiaomi mtk tool

Download Version: V1.0

File type:            compressed/Zip

File Password:         mobileteam 

File Size:                   46 MB

The  Software Runs Smoothly on Windows XP, Windows Vista, Windows 7, Windows 8, Windows 8.1 and Windows 10 (32 bit and 64 bit).
Tool download