Press and hold the and Power buttons simultaneously until the Vivo logo appears.
Install ADB & Fastboot on PC:
Rename image-new.img to twrp.img and move it to your ADB/Fastboot folder on your PC. twrp vivo y71 repack
Explore Project Treble GSIs or ported ROMs for the Vivo Y71. Press and hold the and Power buttons simultaneously
Press and hold simultaneously until the screen turns off. twrp vivo y71 repack