We already showed you how Samsung Galaxy S8 will look like on the outside. And we told you that there are two devices expected - a 5.7" regular Galaxy S8 and a 6.2" Galaxy S8 Plus. Devices will have a dedicated button for the AI assistant named Bixby and for the first time in the flagship's history the Korean company places the fingerprint scanner on the back, next to the camera. This latest leak, showing a couple of official Samsung-made cases for the devices confirms these rumors. The accessories have cutouts on the back for the camera sensor and the LED flash and a separate opening...
Source: http://www.gsmarena.com/check_out_the_official_samsung_galaxy_s8_cases-news-23221.php