[Xiaomi Poco F6 Pro / Redmi K70] Kom_zo:
How to guide - unlocking bootloader POCO F6 Pro​

DISCLAIMER! Unlocking the bootloader VOIDS YOUR WARRANTY. Only proceed if you know what you are doing. I am not responsible for any problems that result from following this guide.

NOTE: Unlocking the bootloader will erase everything from your device. This includes, photos, apps, settings, etc. BACKUP your device before following this guide.

This guide contains a concise list of steps to unlock the bootloader of your POCO F6 Pro.

This guide assumes no prior knowledge of unlocking bootloaders, specifically of Xiaomi devices.

This guide assumes that you have a non-mainland China phone, since unlocking the bootloader is not possible using this method for those devices.

This guide assumes access to a Windows OS computer (obviously you can use MacOS or Linux but this guide is tailored towards Windows).

Required items:​

Your device (duh)

The USB-A to USB-C cable your phone shipped with

An activated SIM card with access to mobile network data

A Windows OS computer with a USB port available

Device Preparation​

Make sure you are logged in on your Xiaomi account (that is at least 30 days old) on your device, with the phone number that is associated with your SIM card in your device. You can check if you are logged in properly by navigating to Settings --> Xiaomi Account --> Devices --> Current device. If it says "Your SIM card is not activated/inserted", go back to Settings --> Xiaomi Account --> Xiaomi Cloud and turn on Messages and Call history. This should make your SIM appear as activated.

Now, navigate to Settings --> About phone and tap on your OS version until it says "You are now a developer!". Then, go to Settings --> Additional settings --> Developer options and turn on OEM unlocking, USB debugging and USB debugging (Security settings).

Open the Play Store and search Xiaomi Community. Download this app to your phone and open it. Log in to the same Xiaomi account as you are logged in with on your device. Click ME in the bottom right of the app and navigate to Set up --> Change region and change your region to Global.

Image credit @NOSS8 and source

Go back to the ME menu, you should now see the option Unlock bootloader. Click on it and then press apply for unlocking.

Image credit @NOSS8 and source

If you see that the app limit quota is reached, you need to wait for it to be reset, which happens every day at 0:00 Chinese time (UTC +8) and then try again.

Once you have granted permission from the Xiaomi Community app to unlock the bootloader, turn off your Wi-Fi and make sure your mobile data is enabled and has access to the internet. . Go back to Settings --> Additional settings --> Developer options and click on Mi Unlock status --> Agree --> Add account and device.

If all is well, you should now have fully prepared your phone for unlocking the bootloader.

Computer Preparation​

Start by downloading the platform tools from Google's android developer website. Extract the zip somewhere on your computer. Then download the OEM USB drivers (if you have a better source, please share) and extract it somewhere on your computer. Turn off your phone. When it has shut down, hold the volume down and power buttons simultaneously to enter fastboot mode. Connect your phone to your computer using the USB cable. Press Windows key + X and click Device Manager. Expand the "other devices" and you should see an "Android" device. Right-click it and select Update driver --> Browse my computer for Drivers --> Browse... and select the entire OEM USB driver folder. Make sure include sub folders is enabled and click next. Now your device should show up as Android Bootloader Interface in the device manager. Whilst your phone is still connected to your computer navigate to the directory where you extracted the platform tools. In this directory click on the path at the the top of the window and type "cmd". In the window that popped up, type "fastboot devices". If everyting worked correctly, you should now see your device ID show up.

Unlocking​

Download the Mi unlock tool and extract it somewhere on your computer. Make sure your phone is still connected in fastboot mode. Now, open the Mi unlock tool and sign in to the same Xiaomi account as you are logged in with on your device. Click Agree --> Unlock --> Unlock anyway. At this point you will have to wait 72 hours. Use your phone normally during this period. After the waiting time is up, connect your phone in fastboot mode to your computer like before, open the Mi unlock tool and click unlock.

Your POCO F6 Pro now has an unlocked bootloader!

(I will be adding screenshots to assist with this guide at a later stage).