Update Huawei Mate 9

Hello all there,

Im new on this forum. Thanks for your Help in Advance!

I bought a used Huawei Mate 9 MHA-AL00 ( Chinese Version). Price was good condition like new.

Now I tried to upgrade from Android 7.0 EMUI 5.0 to Android 8.0 EMUI 8.0.

The Problem is this phone doesnt have the update system option in the settings. If I search for updates it show up but wont open when I press on it.

After all I thought okay, i can still flash it from sd card. I downloaded several versions which promissed to upgrade my phone. I followed the steps from youtube videos and forums. Press Volum Up and Down and Power Button but i always run into this error "Software install failed! Incompatibility with current version. Please download the correct update package"

Im not sure what the previes owner did with the device, its currently not rooted...

I would like to update the device to the latest version. In Advance i would also like to get the auto update option back but its also okay for me to update it manually.

Additional Information:

Modell Number: MHA-AL00
Build-Number: MHA-AL00C00B156

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