IMO OnePlus died when Oppo took over, discontinued Oxygen OS and replaced it with a slightly camouflaged Color OS. I had a 9 Pro that I really liked at the time and some of the OS features I purchased the phone for immediately disappeared. To top it off Oppo seemed to stop fixing bugs, even some severe ones making the phone frustrating to use. I was a repeat customer, but after that there was no way I’d ever buy another OnePlus Oppo phone.

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