What should I choose between sd865(s20) or sd888(s21)...Since I've heard there is heating issue in sd888..I am not a gamer..I Just want lag free and fast and smooth experience in my day to day tasks..I also live in a hot country...What should be bett...

I have galaxy s10(sd 855) .Should I upgrade to s20(sd 865).is it worth it?

Someone please tell that does the s20 5g has 2x or 3x portrait mode after one ui 5 update?

My galaxy s9 SM-G960F has not received update of one ui 2.5 based on android 10 and is currently running on samsung experience version 9.0 based on android 8.0 oreo.Why is that so? And what should i do to update my phone? Please!someone guide me.