Why? This is a user forum, the only people your spam is reaching is other users, please refrain from such flagrant abuse of the forum rules.
If you think OnePlus destroyed your phone with an update, are you seriously contemplating giving them money for a new device?
It depends what you have modified, it's certainly extremely unlikely to hardbrick your device, so there's always the unbrick tool.
It wouldn't help...
Yes, as per the OP, a return to stable branch requires a full /data wipe.
Ask in OP5T thread.
This is a public.forum, you don't get to tell people to stay away. If you don't want to read a users comments just hit ignore on their profile.
What 50$ phones from 2016 are you comparing with? When did they get android pie update?
Is Poland no longer part of the EU? My understanding is an inbuilt call recorder may bring the user, and by extension OnePlus ,in breach of GDPR.
A hardware failure, requires a hardware repair sorry.
As you'd expect with a device issue, factory resetting WILL not fix an OS issue.
Most of the issues here are user issues rather than OOS issues, but the fine tuning an OS inevitably undergoes, that I wouldn't expect.
Because users clamoured for it, OnePlus where never going to put the required effort and time into optimising, another OS, upgrade for an EOL phone .
I'm not sure what you are getting at? Are you saying none of the 9.0.x ROMs are better than 9.0.1? As for Android 10 you know OOS 10 won't come to...
That's no fault returns, this is a defective device contact amazon