If the phone does not respond or gives an error, try the alternative command for specific Vivo configurations: fastboot flashing unlock Use code with caution.
Or if you prefer to re-lock later:
: Within the newly visible Developer options menu, toggle on OEM unlocking . unlock bootloader vivo y71 high quality
Because standard commands fail on Vivo, advanced users generally have to use specialized servicing tools (like UnlockTool firehose files) to force the bootloader open via EDL (Emergency Download) Mode
Replace Funtouch OS with a lighter, cleaner Android version. If the phone does not respond or gives
Save your photos, SMS, and accounts to an external storage or cloud drive. Enable Developer Options: Settings > About Phone and tap on Build Number 7 times until it says you are a developer. Toggle Security Flags: Settings > Developer Options and toggle both OEM Unlocking USB Debugging Step 2: Install PC Drivers and ADB You need a Windows PC to send low-level commands to your Download and install the official Vivo USB Drivers on your PC to ensure it recognizes the device. Download the official Android Platform Tools (ADB & Fastboot) folder from the Android developer website. Extract the Platform Tools zip file on your PC. Open the extracted folder, hold , right-click on an empty space, and select Open PowerShell window here Open Command Prompt here Step 3: Boot into Fastboot Mode Connect your to the computer via a high-quality USB cable.
Once the process is complete, you can verify the bootloader is unlocked. Save your photos, SMS, and accounts to an
For older Qualcomm devices like the Y71, you might need to use specialized tools like Qualcomm Flash Image Loader (QFIL) to patch the partition table, which is an advanced procedure. 4. What Comes Next? After successfully unlocking your Vivo Y71, you can:
: For the Vivo Y71, this official path rarely works. Vivo’s official unlock program focuses on flagship devices (X series, iQOO, etc.). The Y71, being a budget device from 2018, is not officially supported. Most Y71 owners have to rely on alternative methods.
If it returns (bootloader) unlocked , you’re good to go