Samsung rep hints at One UI 2.1 for Galaxy S9 being on the cards, again - SamMobile
Download Samsung Galaxy S9 (Plus) One UI 2.1 Update
Samsung S9 Plus One UI 2.1 Update will arrive says Samsung Care - DigiStatement
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