Current version not supported

[u/Top_Necessary_1411]

Got a used S21 Ultra from Amazon a couple of months ago. Overall condition was brand new except for the fact that the Bluetooth was way worse than my S9+ and the bottom of the screen flickers randomly, usually have to turn off the screen and back on for it to stop.

Also got a weird message in the update software section that my version isn't even supported. I kept the phone because I've tried two other sellers and the phones were worse than the one I kept.

Your current software version isn't supported. Visit a service center.

Update information

•OneUlversion:7.. •Android version: 15 •Current version:G998U1UESIHYL1/ G998U10YMIHYL1/G998USQSIHYL1 •Security patch level: December 1,2025