The update will be done via OTA. As always, if you happen own either of the two phones, and you still haven’t gotten the update, don’t fret or panic. It’s likely that the update is being rolled out in batches, meaning that your device will likely receive the update a little later.

However, if you would like to attempt to speed up the process, you can manually try and update it by following these steps: Settings > Software Update > Download. Once you’ve updated your Galaxy S9 or S9+, Samsung says it should feature a whole new look and feel that will “help you stay focused on the task at hand.” https://www.youtube.com/watch?v=X3LVk0i6bY4 Both models will also get a scene optimiser; a feature that was first introduced on the Galaxy Note9. Additional new features to the phones include a lift to wake mode, a new and improved Bixby, as well as a night new Night Mode. Thanks Seow Tze Chian (@seowtc) for the tip!

Samsung Malaysia Begins Rollout Of Android Pie With One UI For Galaxy S9 Series Smartphones - 9