Since November 2018, I have been fighting OnePlus and their shitty support over this phone. Here is my story and a YouTube video to vent my frustration.
To start, it’s a OnePlus 6T purchased directly from OnePlus. I have done many many factory resets. No mods. No roms. No root. Here’s my story so far with my 6T:
I bought it very late in Nov ’18 and received it Dec 5th.
The first issue I discovered was that a lot of background apps were getting killed frequently including Waze. It was fantastic on a long road trip when I discovered that it wasn’t announcing updates. So I called into support. We started with adjusting battery optimization for just a couple apps. That sorta helped. After a couple exchanges they eventually had me disable battery optimization for everything and that generally settled things down.