This is something I cannot wrap my head around. Even if you get a case, most cases (including all of Apple’s) have a lip around the camera cutout so that even the case will wobble. It’s as if people want a wobble! Ludicrous.
I was never able to find a sleek clear case that would give me a completely flat back. To this day I’m searching and the only option that a[pears to even come close are some of these defender cases that make the iPhone fat and bulky. Yuck.