Better consider a case to protect the back and sides of your Apple iPhone 5 from getting scratched
that is what you're supposed to do with them. But for the purposes of testing out the potential for scratches on the new aluminum body of the Apple iPhone 5, well sure, why not let the kid scratch away. And sure enough, after using keys and a ring to scratch the latest iteration of Apple's iconic smartphone, the sides of the handset and the back are apparently quite susceptible to damage.
And how about the glass back of the Apple iPhone 4S? As the video shows, it holds up much better than the new model. Bottom line: if you have the Apple iPhone 5, you better get a case for it. Don't say we didn't warn you.
source: iFixit via GSMArena