Device bricked? Need urgently help!

[Borkse]

Hello,

I bought the Mediapad M3 a few days ago. Since it still ran with Android 6 and the update program didn't provide me with an update, I went looking for some firmware by myself and downloaded this one here: http://www.stechguide.com/huawei-mediapad-m3-b303-nougat-firmware/

First, I thought it would work nicely but then I recognised that there is no keyboard anymore and other stuff was missing. I decided to do a rollback using this source here: http://www.stechguide.com/downgrade-mediapad-m3-from-nougat-to-marshmallow/

But what happened is that my configured account became deleted and now I am stuck with the startup configuration since I need to enter my Google account login details which is impossible to do for me with just google voice.

I have already tried to do a factory reset or eRecovery but no success whatsoever. Also the device is not recognised by adb or FastBoot in connection with Hisuite. Did I indeed brick the device or what can I do?

Please help me out with this!!

 

[Borkse]

Some more information:

The device is listed with fastboot but I can't flash anything (I encounter the error: "FAILED: (remote: Command not allowed)".

With "adb devices" it is also listed but says "unauthorized".

What can I do?

 

[evilhomura89]

Have you tried restoring it using HiSuite?

 

[Borkse]

Unfortunately, I cannot connect to the phone via HiSuite.