The model numbers of the phones used were 0PJA10/0PJA13. This dovetails with a tweet from @upleaks last month (since removed) that said that the HTC One (M9) would be part of the 0PJA series. The 3,024 x 5,376 resolution of the pictures suggest that a 20MP snapper was used, when you take into considering that they were cropped to fit a 16:9 aspect ratio. The HTC One (M9) is rumored to be carrying a 20.7MP snapper on its back. More precisely, the sensor is rumored to be a Sony Exmor RS IMX220.
The big news revolves around a picture taken by an HTC employee of a Sony Xperia Z2 that happened to be lying around while the test pictures were being taken. If you look at the reflection seen on the screen of the Xperia Z2, you see the image of the back of the phone that took the photo. That phone is supposedly the HTC One (M9). And guess what folks, the rear camera and the flash lines up perfectly with cases made for the HTC One (M9) by an Asian firm. We showed you a number of pictures of that case a few days ago.
This looks like it could be the real thing. If so, there are some aspects to the design that resembles the HTC One (M8), and some things that obviously are different (especially the lack of the Duo camera). Does this whet your appetite to see the next HTC flagship phone? We expect the device to be unwrapped in Barcelona on March 1st during MWC.