Cool !its kind of confused,I rebranded my phone a few times .but I can't find those filesThe two things you need are the HWOTA and HWOTA8 zip files. I found them on here by Googling them. The process is confusing for most users but this is what i did. The HWOTA will update you to Oreo and the HWOTA8 will install the Oreo recovery or flash you back to Nougat. This is a the basic way I did this.
Unlock Bootloader
To update to Oreo you have to put the Oreo Stock ROM files from Firmware Finder (the three zip files) in the HWOTA update folder. You have to rename two of the three files, one to update_all_hw.zip and the other to update_data_public.zip., leave the update.zip as is. Then run update.bat from the HWOTA folder and it will do everything for you. There will be a choice to either flash Oreo to the same device model or to rebrand. I had rebranded using another method but you can use HWOTA for that.
To roll back you have to put the three firmware files in the repack folder in HWOTA8 then run repack.bat as an administrator. Then move the three firmware files into the main HWOTA8 folder. Then copy the whole folder to your SD Card and boot into TWRP and flash the hwota8_update.zip which will flash the entire Nougat stock rom back.
I just find this: https://forum.xda-developers.com/mate-9/how-to/guide-mate-9-flash-oreo-update-package-t3699522
https://forum.xda-developers.com/mate-9/development/official-oreo-update-emui-8-0-download-t3698229
where did you get the files?
Thanks
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