My new iPhone 8 seems a tad bit warped. It wobbles corner to corner on a flat surface. I've tried many surfaces, and sure enough. Anyone else? I have only had it open 1 day, and it's barely been in my pocket.
Are you planning on getting a case? That can help a lot with the issue you described. I tried to go caseless for a bit but always had to put my phone on something soft so I didn't wear out my camera bump. So I use a Sena wallet case and have really become attached to it - can lay my phone down on anything and it grips well too.