Just received my s21 on Thursday 18th March, been using it for a few days. i've not even got all my apps setup, only downloaded. And have found the battery drains fast.
Faster than my 3.5 year old pixel 2 xl. Which is odd. That this old phone with a smaller battery and more pixels lasts longer.
Is this an issue with exynos SoC? This is my first Samsung Android phone and so far I am not impressed.
3hrs 46mins screen on time, 29% battery remaining.
I am using the phone in 60hz. Bluetooth is off, adaptive brightness for the screen. I don't have it really bright, dark mode is set. WiFi is on(I am at home most of the time), 4g and mobile data enabled(i don't have 5g calling plan), no dynamic lockscreen/wallpaper.
What are you getting on on your s21?
Can I return the phone to Samsung if I am not happy? It was bought directly from Samsung online shop.
(UK version s21, Grey, 256GB,)
Added screenshot to show latest OS update installed.