Mobile carriers in the US has successfully delivered the rollout of Android 9.0 Pie for locked Galaxy S8 and Note 8 devices and now the Unlocked versions of these phones are being upgraded to Android Pie.
The latest update for these devices brings Android version 9.0 Pie and Samsung's One UI interface along with new features. Also, the update contains March 2019 security patch including bug fixes and system improvements.
The update for Galaxy S8 and S8+ comes with build version - G950U1UEU5DSC1 and G955U1UEU5DSC1 respectively and Galaxy Note 8 with N950U1UEU5DSC1. If the update has not reached to your phone, please be patient as the update proceeds in more phases.
Users of this phone can check this update manually via Settings > Software update > Download update manually.