My s21 ultra 10x zoom lens rattles with any slight sudden movements side to side(portrait orientation) and online seems to be a common issue with it being louder than normal and even just tilting it side to side , and sounds like a tic tac is loose inside. It stops rattling when the 10x camera is being used and stablized and I know, it's ois. Samsung should add an option to always keep the 10x telephoto camera stablized when the phone is being held to reduce rattling of the sensor. It already does this when you shake it harder and the noise stops and you can hear it release after you stop shaking it.
I know it's completely normal but they could fix it by adding a software update and just add an option to keep it stablized while you're holding your phone for if it bothers you or in my case is louder than it used to be.
Still just have an option, I don't know how much of a difference you'd see in battery life, but it might be worth it to not have a rattle everytime you move your phone.
