Twrp Vivo Y71 Full High Quality -

If the device enters a bootloop after flashing TWRP:

Comprehensive Technical Analysis and Implementation Guide: TWRP Custom Recovery on the Vivo Y71 twrp vivo y71 full

Vivo does not provide official unlock. Use the method: If the device enters a bootloop after flashing

Installing a custom recovery like TWRP on your Vivo Y71 (released in 2018) opens up the ability to flash custom ROMs, create full system backups, and gain root access. Since this device runs Android 8.1 Oreo, it follows the standard fastboot flashing procedures common for that era. create full system backups

In the command prompt, type the following command to temporarily boot the recovery (recommended for testing first): fastboot boot twrp.img (Replace "twrp.img" with the actual filename of your download).