This is the Galaxy S9 One UI 2.1 firmware being tested by Samsung - SamMobile
29 New Features in Samsung's One UI 2.5 You Won't Want to Miss « Android :: Gadget Hacks
One UI 2.1 for Galaxy S9 and Note 9 is Now in Development
One UI 2.1 for Samsung Galaxy S9, Galaxy S9+ now available - Android Community
One UI 2.1 update might be coming soon to Samsung Galaxy S9 and Note 9 - PhoneArena
One UI 2.1 might not be headed to the Galaxy S9 and Note9 after all - GSMArena.com news
Android Police on Twitter: "One UI 2.1 update starts hitting Samsung Galaxy S9 with June security patch in tow https://t.co/B3kn9RkbrB https://t.co/NJ9Mymt3Vt" / Twitter
Samsung Galaxy Note 9 & S9 Plus get MASSIVE ONE UI 2.1 Update - All New Features! - YouTube
T-Mobile Galaxy S9 update brings One UI 2.1, Note 10 also updated - TmoNews
Galaxy S9 and Note 9 will receive One UI 2.1 update - Gizchina.com
One UI 2.1 update for Samsung Galaxy S9 and Galaxy Note 9 reportedly under development - NotebookCheck.net News
Samsung Galaxy S9/S9+ Install Android 10 One Ui 2.1 BIG Update| DOWNLOAD LINKS IN DESCRIPTION!! - YouTube