It’s been a long time coming, but the official Android 8.0 Oreo update for the Samsung Galaxy S8 and Galaxy S8+ is now rolling out to customers. News of the final build of Android Oreo being delivered over-the-air to customers came from Germany.
The first customers to receive the update are testers that have been in Samsung’s beta program

Source: Hot Hardware – Samsung Galaxy S8 And S8 Plus Finally Receiving Android 8.0 Oreo Update