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How to Unlock bootloader via fastboot ?

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Today I will guide you how to unlock bootloader of you android device with fastboot. But not all Android devices support unlocking bootloader direct with fastboot like Xiaomi, it requires permission to unlock bootloader. 

How to Unlock bootloader via fastboot ?

Requirements :

1. A pc or desktop
2. ADB & Fastboot setup file (click here for tutorial on how to install ADB & Fastboot files) skip if already installed.
3. your device is at-least 20% charged before unlocking bootloader.

NOTE : please backup the important files before unlocking the bootloader beacause unlocking the bootloader will completely wipe/delete all data on your device. Including photos, videos, movies, documents, apps, games,etc

Steps to follow :

1. Setup ADB and Fastboot on your PC.
2. Enable USB debugging and OEM Unlock on your Android device.
3. Connect your device to the PC with a USB cable.
4. Open a command window on your PC.
5. Type  adb reboot bootloader  and hit enter.
    If asks for permission to “Allow USB debugging”, tap OK.
6. Once your device is in bootloader mode, type  fastboot oem unlock   and hit enter.
    If you get a confirmation screen on your device. Press Volume Up button to highlight Yes  This will begin the bootloader unlocking process.
7. Once the bootloader is unlocked, your device will reboot into bootloader mode. To reboot your device just type fastboot reboot   and hit enter.
    
    Your device will reset and start normally.

    That’s all. Your Android device’s bootloader is now unlocked. Enjoy flashing custom 
modes,roms,etc.
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