The Samsung Galaxy S9 and Samsung Galaxy S9+ (shortened to S9 and S9+, respectively) are Android smartphones manufactured and released by Samsung as part of the Samsung Galaxy S series. The devices were revealed on 25 February 2018, as the successors to the Samsung Galaxy S8.
The phones run of the Android 8.0 Oreo. In December 2018, Samsung began releasing the Android 9.0 Pie for the S9. This update featured a revamp for Samsung's One UI.
Many S9 phone user reported experiencing a below average level battery life. The issue was fixed by Samsung in an August 2018 update.