Spotted by the Nowhereelse.fr, the shell is apparently one of two prototype designs for the iPhone 7 with the other having just one speaker and no headphone jack.
Additionally, the rear shell once again reveals a larger opening for the camera, corroborating rumors that Apple will be improving the camera on the next generation 4.7-inch iPhone.
I will never buy this phone if it doesn't have a headphone jack. I'll get a new brand when I get to that point. I have a Bluetooth headphone and I have to charge it all the time and only last for so long .if I have a headphone plug then I don't have to charge it and I don't mind wearing headphones. I or if I have a headphone it requires batteries in with a heck of a lot longer than the Bluetooth ones. And they're always available. I think it's a stupid idea.
It could be that the right 2 holes on the left side speaker are for the microphone. Which is why they're maybe smaller. Or it just could be a scrap or test casing for case makers. Could be fake but undone think so. Don't assume it just because somethings off a bit.