If you see mentions of Android 12 for this device, they are referring to Custom ROMs
Although Samsung has officially ended support for the Galaxy S9 Plus, the Android community has come to the rescue. Developers and enthusiasts have created custom ROMs and kernels that allow users to experience Android 12 on their devices. samsung s9 plus software update android 12
| ROM Name | Android Version | One UI vs AOSP | Stability | | :--- | :--- | :--- | :--- | | | Android 12 (One UI 4.1) | Samsung One UI 4.1 (Port from S20 FE) | Daily Driver (with minor bugs) | | LineageOS 19.1 | Android 12L | Pure AOSP (Google Pixel style) | Very Stable | | Pixel Experience 12 | Android 12 | Pixel UI + Features | Stable | | Project Elixir | Android 12 | Custom AOSP | Moderate | If you see mentions of Android 12 for