A week ahead of the launch of Apple's iPhone 7 and the iPhone 7 Plus, a video has emerged online that shows the latter. Not just a dummy piece but a fully functional one, and not one but three of those.

The short video appeared Wednesday morning on the Twitter account of Sonny Dickson, who has famously leaked other Apple devices before they launched for years now.

The visuals confirm widespread rumors about the design of the plus-sized smartphone: it will not be markedly different from its predecessor. At least not when viewed from the front.

The video confirms the existence of a dual-lens camera in the back of the device, something enthusiasts are looking forward to. Another small change is the antenna-casing design, which is tweaked to make for fewer bands across the back of the phone, making it look sleeker.

Based on the video, it is difficult to tell if the Home button has been upgraded to support 3D touch, but the featured devices appear to show what looks like the public release version of iOS 10.