A blogger took to Douyin (the Chinese version of TikTok) and shared a video, asserting that the scratches found on the demo units of the iPhone 17 series were a result of people repeatedly dragging the phone's back cover across a metal surface. To put this assertion to the test, the blogger carried out a friction experiment right there in the Apple Store, using an iPhone 17 Pro demo unit. True enough, scratches became visible on the phone's back cover. Following the video's release, it quickly stirred up a storm of controversy, attracting over 600 comments from viewers.