Hi, I have registered now. I am the original poster. Yes, I have done that. What I'm saying is that when I go into settings for a specific app using settings>apps>notications>categories and change the notification sound for that app, it still continues to play the default notification sound selected for the whole phone under settings>sounds and vibrations. I don't know if this is related, but I recently set up this phone using smart switch. My previous phone was a galaxy s8. I did have that phone set up to play different notification sounds for different apps but that wasn't maintained with smart switch. In at least some cases, the previous sound is not avaliable on this phone. But if it is related to that, it doesn't really explain why I can change the app setting to a certain sound but that is not the sound that actually plays. I have tried restarting the phone also. Thanks for any thoughts.