SalLmc , via OnePlus 9 , May 6, 2021 : the edge of the screen has a low sensitivity. especially when I touch the edges with 2 fingers at the same time. it seems like a feature preventing carelessly touch on the curved edge device like op9pro. however op9 has a flat screen, which makes this problem quite annoying. I think quite a lot users have the same problem, but it's unsolved so far.