[Huawei Mediapad M3 Guides, News, & Discussion] ericzollman:
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The official Huawei bootloader unlock program has been shut down! This guide describes how to use DC-Unlocker which will cost you about $5 USD.

I am NOT affiliated with DC Unlocker in any way!!.

This is simply the cheapest and easiest method I could find...

I have only tested this method on BTV-W09 running Android 7 and EMUI 5.0.3.,

If you have a BTV-DL09 device, please reply and let me know how everything goes...

You need ADB and Fastboot installed on your PC.

This will FACTORY RESET your tablet!!! and as always: Don't blame me for Bricks & FOLLOW THIS GUIDE AT YOUR OWN RISK!!

-Unlock Bootloader-

0. Enable USB Debugging and OEM Unlock in developer options.

1. Download DC Unlocker and extract it on your PC.

2. Open the program and choose 'Huawei phone' under manufacturer and 'Auto detect' under model.

3. Plug your device into your PC and put it into 'manufacturer mode'.

3.1 Open the Calculator app in LANDSCAPE mode

3.2 Enter this code: ()()2846579()()=

3.3 Tap on 'Project Menu' - 'Background settings' - 'USB ports settings' - 'Manufacture mode'.​

4. Click the search button in DC Unlocker and make sure your tablet is detected.

5. Click on 'Buy Credits' under the About section.

6. Use the website to buy 4 credits for a new account.

7. Click on 'Server' in DC Unlocker and log in using info obtained in step 6.

8. Once your logged in click 'Unlocking' then select 'Read Bootloader Code'

9. Wait until your code is displayed then copy and save the code.

10. Turn off manufacturer mode.

11. Open a CMD Prompt and type the following commands.

adb devices
//make sure your device is listed.

adb reboot-bootloader
//Wait for your device to reboot (white screen)

fastboot oem unlock XXXXXXXXXX
//replace XXXX with your code

12. Wait... your device should now reboot and do a Factory Reset...

13. After reset, boot your device and go through android setup.

Congrats your bootloader in now unlocked.​

-Flash Greatslon TWRP-

0. Download TWRP for your device.

TWRP - BTV-W09 EMUI 5 (This is the only Model & Version I have tested)

TWRP - BTV-W09 EMUI 4

TWRP - BTV-DL09 EMUI 5

TWRP - BTV-DL09 EMUI 4

1. Enable USB Debugging

2. Plug your device into your PC.

3. Open a CMD prompt in the same folder as TWRP image.

4. Enter the following commands.

adb devices
//make sure device is listed

adb reboot bootloader
//wait for device to reboot

fastboot devices
//make sure device is listed

fastboot flash recovery XXXXXX
//replace xxxx with your TWRP file name

5. Completely shut down your device and unplug any USB cables. (some devices have problems booting TWRP when a USB cable connected)

6. Boot into recovery (PWR+VolUP).

Congrats You have flashed TWRP.​

-Root Device-

0. Download the latest Magisk release.

1. Download Magisk Manager APK file.

2. Open a CMD prompt in the same folder as files

3. Type the following commands

adb devices
//make sure your device is listed

adb push Magisk-v20.4.zip sdcard/
//change name if needed

adb push MagiskManager-v7.5.1.apk sdcard/
//change name if needed

adb reboot recovery
//wait for device to reboot

4. Install Magisk | 'Install' -> Select: Magisk zip -> Swipe to confirm.

5. Wipe Cache/Dalvik.

6. Reboot to Android.

7. Install Magisk Manager to confirm root..

Congrats your device is now Unlocked and Rooted running a custom Recovery.​

:: EDIT ::

LienageOS 15.1 now available on this device., Visit the following thread for my install guide.

[GUIDE]-[ROM][8.1][LineageOS 15.1 - Huawei Mediapad M3 8.4][BTV-W09, BTV-DL09]​