On the Russian forum 4pda, I personally posted the installation instructions for android_9 on the revision with the P60 processor
Naturally, this is not an official installation method, but at least I’ve been using android_9 for a month on my bv9600Pro (p60)
absolutely everything works, even contactless payment ..
Officially, on the old revisions, android_9 will never appear .. otherwise, who will buy the new revisions !?
I also want to remind everyone that in no case do not install android_9 on old revisions if you have no experience using the flasher ... otherwise you will overwrite the nvram block. A lot of users lost nvram when trying to install android_9 ...
Restoring nvram is much harder than wiping, especially when there is no personal backup