[Huawei P9 Questions & Answers] vorlockfoss:
Hi all,

How are you?

I have spent soooo many hours trying to upgrade my new old stock Huawei P9 EVA-L09, its driving me absolutely crazy. When I bought it, like an idiot, I didn't check the Android Version, which I discovered was 6. So, I did oodles of research, gathered the right tools, downloaded the suggested updates and started.

I successfully upgraded to the latest android 6 (L09C432B210), but I tried many versions of Android 7, but to no avail. I eventually found a version of Android 7 called 'L09C432B322' that worked, but when I checked it says 'NRD90M test-keys', which is EMUI 5, Android 7; it is a fully functioning version of Android 7 but it is a pre-release version I believe, and neither the 'Files' option nor the 'Update' option are available on it, which is a pain. I have now tried a total of 23 different update versions, but no success, and with exactly the same issue with the update process, saying that it cannot update using that version (not precise wording!).

A couple of days ago I accidentally ended up on the phone update screen, the one with the big circle, while I was trying to get in to TWRP (fat fingers...). It sat there for an age doing absolutely nothing (aside from the circle spinning), not even failing, and I didnt even have an update file in 'dload' on my SD Card (not that I'm aware of), so I pressed the power button and shut it off. Now when I try to update, using either update.app via manual update or update.zip via HWOYA7, any update at all tbh, even old ones that I know failed but at least the update file was seen by the phone & process, it tells me the install failed and 'the update package does not exist'. I thought it may be a file extension association issue in Windows 10 (not sure how, just clutching at straws), so I reset the associations to Windows default, but that did not work. At around about the same time of the update issue starting, I couldn't say for sure when as I wasn't paying enough attention, I started using the HWOTA7 tool, which too gave the same result of 'the update package does not exist'.

Did HWOTA7 cause this? Did I cause this inadvertantly? Has a broken update.app caused this? I simply do not know and am hoping one of you fine people may be able to help me. Is the process looking in a different place to where either HWOTA7 puts the file (not changed from default) or where I put the file (SD Card 'dload')?

The reason I'm trying to update is because Android 7 is no longer supported by Google and one by one apps are disappearing from Google Play, so I'd like to update to Android 8 (Oreo). There lays another fine issue as I cannot find a version of it anywhere, not since Huawei removed the updates from its site a couple of years back. Not that any update will work of course...

I've never known a phone to be so difficult to get the correct software for and to ultimately upgrade. I even managed to update an LG G5 around 2 years ago when there were no official updates, but this Huawei P9 is just silly...

I think the update process should be this, update to the latest possible Android 6 then 7 for the P9, rebrand to the AL10 and, update to the chinese Oreo and then overlay the Kirin fix (I think); is that correct?

Thanks folks. :)

Paul.