Install Pie If You've Got Android Oreo Problems
If your Galaxy Note 9 is struggling with problems on Android Oreo, you might want to install the Android Pie update right away.
The Android Pie/One UI update isn't perfect, but there's a good chance it will correct at least some of the issues you're seeing on Android Oreo.
The Android Pie change log doesn't call out specific bug fixes, but Galaxy Note 9 users are seeing improved performance in key areas like battery life, connectivity, and overall speed. This isn't surprising.
Android updates, particularly major releases like Android 9.0 Pie, often fix common issues like severe battery drain, reboots, lag, and issues with connectivity (Wi-Fi, Bluetooth, cellular data, GPS).
If your Samsung Galaxy Note 9 is tied to a specific carrier, you'll likely get some additional bug fixes from your provider.
Samsung's version of Android 9.0 Pie also comes with some changes to Device Maintenance, now called Device Care.
The company says performance modes are now streamlined and integrated into Power saving modes making it easier than ever to get a handle on key areas of performance.