: This process typically voids your official warranty.
If software commands fail, you must open the back cover and short the "Test Points" on the motherboard while connecting to USB.
EDL (Emergency Download) mode is used for deep system flashing via Qualcomm tools (QPST/MSM). : In CMD, type: fastboot oem edl . vivo-fastboot-bootloader-unlock-reboot-fb-to-edl
For newer models, use the (APK/PC tool) to request the unlock permissions first.
Reboot from Fastboot and immediately hold while plugging in the USB cable. Method C (Hardware Test Points) : : This process typically voids your official warranty
: Unlocking the bootloader performs a factory reset. Back up everything.
Vivo devices often require an unlock key or a specific "Fastboot Unlock" tool provided by Vivo for certain regions. Open a Command Prompt (CMD) in your ADB folder. Verify connection: fastboot devices . For older/standard models, try: fastboot bbk unlock_vivobt . : In CMD, type: fastboot oem edl
Confirm the unlock on the device screen using the volume keys. Phase 3: Reboot from Fastboot to EDL Mode