If you screen is yellow and screen is not visible clearly and brightness bar adjustment is a problem, and unable to view or see the screen with high resolution, Many people feel it's a display problem and then they replace the display, But it's 100% not a display problem, it's software issue on samsung galaxy note 9 device. Solution: Please use "OLED Saver" app from Google, Once download > Install> Enable OLED Saver Then please observe the difference on display, before and after. And we can able to watch HDR videos on youtube on SAMOLED resolution after installing OLED Saver app. Please try, it will not cause any issue on the mobile, i am using from last 1 year. If not satisfied you can uninstall the app.

Open phone settings>apps&permissions>app permissions>microphone>Google>turnoff microphone access to the Google and restart your mobile,after done my phone mic working on call

If you screen is yellow and screen is not visible clearly and brightness bar adjustment is a problem, and unable to view or see the screen with high resolution,

Many people feel it's a display problem and then they replace the display,

But it's 100% not a display problem, it's software issue on samsung galaxy note 9 device.

Solution: Please use "OLED Saver" app from Google,

Once download > Install> Enable OLED Saver

Then please observe the difference on display, before and after.

And we can able to watch HDR videos on youtube on SAMOLED resolution after installing OLED Saver app.

Please try, it will not cause any issue on the mobile, i am using from last 1 year. If not satisfied you can uninstall the app.