GUIDE] Change your CSC on any Samsung Galaxy devices running Android 10 or older - will also work in Android 11 for builds older than January 2021 | XDA Forums
Speculation] "Here's why Project Treble might not help Samsung much with Android Pie"
US unlocked Galaxy S9 gets Android 10 update in record time - SamMobile
The Samsung Galaxy S9, S9+, and Note 9 will not receive Android Pie this year - NotebookCheck.net News