A report seems to suggest that the sharp edges of the phone could be too sharp for the hands. Pictures supposedly shared by some early users in China show cuts and pressure marks on fingers blamed on the iPhone 12, which was made available in the US, China and some other countries less than a week ago.

source https://gadgets.ndtv.com/mobiles/news/iphone-12-sharp-edges-design-cut-fingers-pictures-report-china-wechat-2316349#rss-gadgets-all