The two images that allegedly show the upcoming OnePlus 6 flagship surfaced on a WhatsApp group, where it was posted by someone claiming to be an insider familiar with the matter. One of these images confirms a previous rumor that mentioned a front with a notch similar to that of Apple's iPhone X. The other one shows a back with a vertical dual camera setup and an oval-shaped fingerprint reader.
https://www.notebookcheck.net/OnePlus-6-hands-on-images-leak-online.286826.0.html