Thanks to leakage, let's try the latest Android Pie beta on the Galaxy S9, we already have a good idea of what the update has saved for Samsung's flagship forwards. As we will expect, Android 9.0 comes with a lot of noteable updates, such as a system tray dark theme and a brand new TouchWiz replacement called "One UI".
As it turns out, these leaks were just appetizers, as Samsung has started the official rollout of Android Pie beta for Galaxy devices today on November 15th. However, it is a catch, as the software update will only be available for unlocked S9 models in Korea, Germany and the USA, at least initially. It just started to roll out today in South Korea, and the American beta program has finally gone from kl. 11.30 in the Pacific Ocean.
First, you need the Samsung + app. You can find it by searching for "Samsung +" with the Galaxy Apps app in your appbox or by clicking the link below and then selecting "Galaxy Apps" from the "Complete Action" dialog. Once you've reached the Samsung + Download Page, touch "Install" to grab the app.
Then open the Samsung + app and log in with either your Samsung account or your Google Account (both tasks must already be saved on your phone). From here, if the One UI beta program is available for your Galaxy S9 or S9 + variant, you'll see a small banner toward the center of the page. Just tap this banner and then follow the screen's instructions to sign up for the beta application.
If you do not see the Pie Pie registration instant message in the Samsung + app, it's probably just a matter of time before it appears (assuming you have a supported Galaxy S9 variant, of course). So be sure to check out the Samsung + folder frequently, as there is only a limited number of slots available on the beta application.
After signing up for the beta version, open the Settings app and select "Software Update." From there, tap "Download updates manually," then wait a few seconds while the phone checks the update. If it does not show up right away, check back in about five minutes.
When the update is found, it will be downloaded and installed automatically. This process takes up to 30 minutes, so make sure you have a charger at hand.
Remember, this is a beta build, so you can encounter some bugs – even though Samsung has tested this firmware internally for a few months now, so it's pretty stable. However, the building does not transfer SafetyNet, so you lose access to some apps like Netflix and Pokémon GO. If it's too much for you to stomach, know that Samsung has said they will release the final public build of Pie to beta-eligible phones in January 2019.