[Huawei MediaPad M5  Guides, News, & Discussion] Apo11on:
DISCLAIMER: I'm not responsible for anything that happens to your device. Use the steps below at your own risk . Be mindful of the facts unlocking bootloader voids your warranty and also hard resets your device - ALL YOUR DATA, SETTINGS, FILES AND APPS WILL BE DELETED. These steps worked for me - I own Chinese version of 8.4" LTE model. I do not know if they will work for any other models of M5, including European versions, WiFi only version and 10" models.

To execute the steps below you will need to obtain unlock code, specific to bootloader of your device. There is a slow, painful and free way to get it, and there is a quick and easy way to get the code instantly, which will cost you 4 euros. The slow way is to create Huawei ID, register on Huawei website and request the unlock code directly from Huawei, through dedicated link they provide. I do not use this method, so I don't have the link - do not ask. You will have to provide justification why you need it, such as being a developer and you bought the device to develop and make a living off of it - something Huawei support would find reasonable. In most cases they will not agree to unlock bootloader if you just tell them you want to install some roms. In this guide I will be describing the other method to get it done, which costs 4 euros.

Follow these steps.

1. Go to DC Unlocker website, register for an account (or login, if you already have one)

2. Buy 4 credits (cost is 4 euro) using the Buy link

3. Download the latest DC Unlocker client (pictures 1,2 below)

4. Open the DC Unlocker client, click "server" tab on the right (picture 1) , enter your website login you created in step 1 and click "Check Login"

5. Select "Huawei phones" from "Select manufacturer" dropdown

6. On your M5, go to Dialer app, and type in *#*#2846579#*#* to open Project Menu

7. Click Background Settings->USB Port Settings->Manufacture Mode

8. Connect your M5 to PC via USB cable and return to DC Unlocker client

9. Click the Search button to detect your device. It should be detected as "Huawei HiSilicon Kirin Android" (picture 1)

10. Click "Unlocking" tab

11. Click "Read Bootloader Code"(picture 2). It may not work on the first try, but don't worry - unsuccessful bootloader code reads do not spend your credits. Give it a few seconds, disconnect/reconnect USB cable and try again

12. Copy and save generated bootloader code

13. Download Huawei Multi Tool from the bottom of this page and install it

14. Boot into download mode by powering off your M5, then holding Vol Down + Power keys simultaneously for a few seconds and then plugging in USB cable while still holding these 2 keys

15. Open Multi Tool v8 and paste the code you got from DC Unlocker into "Get Unlock Key" input field

16 Click "Use your key" button next to it (picture 3)

17. On the bottom right click the green "Unlock bootloader" button

18. You will get a bunch of warnings on your M5 screen about unlocking bootloader - press Vol Up key and then Power key

19. At this point your bootloader will be unlocked and M5 will factory reset itself

Note: using Multi Tool is optional. Instead, if you have ADB tools with fastboot installed on your PC, then after step 14 you can just use fastboot to unlock your bootloader, by typing "fastboot oem unlock <code>"

Note 2: I don't do tech support via PM, so don't PM me for help or with questions. Use the thread instead, and some other XDA members or myself will probably help you. Good luck!

Now I'm hoping some dev takes a shine to our phablet, and compiles TWRP build for it. It can certainly be installed now that we managed to unlock the bootloader :cool: