[Q] How resistant is the back to scratches

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Any people who don't use cases already have scratches yet? Any idea how resistant it is to scratches? Thanks in advance.

A week in my pocket at work in a warehouse, no scratches yet..... I do plan to get a case though

Mine hit concrete from a distance of 4 feet, corner first. And I picked it up, blow off the side, rub it a little and I can't even tell what part got scratched.