User Activity

Hi Team,When can except the date for upgraded the Samsung UI 4.0 and Android 12 for Samsung S21 ultra
I am not getting one day battery life could you please provide me a tip or suggestion to improve battery
when will get Software update for UI 2.5 for Samsung note10 plus
when will get Android 11 for Samsung note10 plus and UI3.0 Feature when it will be available.
Hi Team,My Battery backup is less than one day and how to get battery backup for more than one day.