I hate that my phone won't sit flush on a table and/or wobbles. I also cringe any time I put my phone down directly on the lenses. This will serve double duty, stopping the wobble as well as add some protection to the camera lens. 

 Works and looks great on its own, but in the pics, you can see what it looks like on the phone without a case as well as using an aluminum bumper. I use this bumper. 

https://www.ebay.com/itm/295519092088?mkcid=16&mkevt=1&mkrid=711-127632-2357-0&ssspo=CKXWkq9yS7O&sssrc=2047675&ssuid=MBGdvpCXQ06&widget_ver=artemis&media=COPY

This printed in the uploaded orientation. so that the exposed part gets the nice bed texture if youre into that sort of thing. Mine is PETG, but PLA, ABS, and TPU would all work great as well. PETG is just what I already had loaded. Once printed attach with really thin double sided tape. This is what I'm using:

https://a.co/d/0ymnyzE