rramyogesh , via OnePlus 9 Pro , Jul 24, 2021 : I'm getting lots of bug and lag issue in my OnePlus 9 Pro 12GB RAM 256GB ROM varient .Also Mobile's Display also has lots of issues, when I am using wallpaper with "Black Wallpaper" as background : some area in the display change colour like 'GRAY' colour while I am unlocking my mobile , also opening some of the apps in my Mobile. The default app such as OnePlus Launch apps are keeps stopping sometimes, also the System UI also doing the same at the same time. So I had to restart my Mobile to fix that bugs , also while lagging. The mobile doesn't have battery optimization very well ; in this side Apple , Samsung, Google, Asus mobiles are better in all the ways than OnePlus brand mobile. Also the the mobile doesn't support 120 fps in all the apps, in major apps it use 60 fps but the predecessor models such as OnePlus 7T series mobiles use 90fps in majority apps also in games. OnePlus 9 Pro don't support 90fps in game but OnePlus 7T series support 90fps in game. Charging time also take more than 45 minutes (1-100%) while the mobile is turned off, but the company told that it takes 30 minutes to fully charge(1-100%) the mobile.