The Galaxy S8's fingerprint sensor location has been one of the more controversial elements of the phone's design, with concerns being raised over reachability, and the potential for fingerprint smudges to accumulate around that rear camera lens. And it appears Samsung, too, is aware of the potential for picture-smudging grease to build up back there.

Once you set up fingerprint authentication — but not before you take this step — the GS8's camera app will tell you to regularly clean your lens at launch, via a pop-up message.