when will s9plus get android 11 update???

my bluetooth takes time while switching on and switching off in s9 plus ,why so? phone uldated to dec 1 ,2020

S9 plus screen turns to green , whats the solution? Never fell down, never fell phone into water. I also had factory reset but also problem occurs. What will be the solution and what actually the problem is?? I bought it just 18mnths ago brand new on...

How do i restore my samsung notes (files) after factory reset ,please help