iPhone 8 are based on supply chain sources procuring parts for various prototypes of a special edition iPhone that are still in the EVT (Engineering Verification Testing) stage. This means that Apple still hasn't decided on the final look and feel, and is currently sourcing parts for the DVT (Design Verification Testing) stage, on which analysts are basing their memos to clients about Apple's 2017 plans. These parts include white ceramic, glass, metal, and other more or less exotic chassis materials, as well as both flexible OLED screens and IPS-LCD displays. They are also said to include designs with and without a Touch ID button, with face scanners, and so on.The thing is, Macotakara says, that all those analyst predictions about the OLED
What's really set in stone at Apple about this special edition iPhone, however, is tipped to be very limited. The basic features decided upon include ~5" screen, dual camera, Lightning port (no USB-C), plus wireless charging, and that's that, claims the source. All other features and the possible looks are apparently still up in the air, and Macotakara claims that this "edition" iPhone may be announced in September, together with the iPhone 7s and 7s Plus, but the actual release date could be much later. Where does that leave the rumors that Apple has ordered tens of millions of OLED display panels to Samsung remains to be seen, but for now it's worth noting that the chances for an OLED iPhone 8 with wraparound panel being released in September are not one hundred percent.
source: Macotakara (translated)