Can u please tell me region of your ROM , is it 5g version?

can you please tell methe build number that your battery life easily went 2 days?

I'd like to downgrade to android 11 because of draining battery, can you please tell me the build number before 2nd last update that your "battery is easily went 2 days" or if you don't have that build number give me a clue to find that on internet?

Hello can you please tell me what do you mean by 2nd update? do you mean andoid 12?