Go back to > More Settings (or System) > Developer Options . Enable OEM Unlocking and USB Debugging .
Warning: Unlocking the bootloader will factory-reset the device, may void warranty, and can cause data loss. Proceed only if you accept these risks. unlock bootloader vivo y71 high quality
: Since the device will be wiped, ensure you have a full backup. Go back to > More Settings (or System) > Developer Options
: You must have a PC with ADB and Fastboot drivers installed, a high-quality USB data cable, and a minimum 60% battery charge on your device. Step 1: Preparing the Device may void warranty
However, if you depend on banking apps or Google Pay, note that unlocked bootloader breaks . You can hide root with Magisk, but it’s an extra step.