Yes, you have to set your new Samsung Galaxy S24 Plus or Galaxy S24 Ultra to its full QHD resolution manually. If you don't change it, you won't get the best out of your phone's screen.
Arguably Samsung's doing users a favor by making FHD the default, since it's more power efficient, but this is a choice that you, the Galaxy S24 owner, should make for yourself. And in this tutorial we'll show you where to find the resolution settings and the advantages and disadvantages of the three options you'll find there.
