https://wccftech.com/stable-android-pie-update-rolling-out-for-the-galaxy-s9-s9-plus/

There’s nothing quite like some Pie to liven up your holidays. Galaxy S9+ and S9 Plus owners will be pleased to know that Samsung is beginning to roll out a stable Android Pie build to both devices. The update comes about a week earlier than Samsung’s promised milestone of January 2019. We’re not complaining, though. It isn’t surprising in the slightest, considering that both devices received the fourth iteration of the beta version only a few days ago. This time around, it isn’t just the beta testers getting a slice of the pie. Users on a stable Oreo release have reportedly begun to get the update as well.

Sammobile first spotted the build in their forums, where several members had downloaded it OTA. Like most of Samsung’s releases, the update is rolling out in the German market. It is only a matter of time before international variants receive it. Depending on where you live, it may take up to a week for unlocked versions. Carrier-locked versions are at the mercy of their carriers, though. The software is also available on Samsung’s servers, but sideloading isn’t an option just yet.