Although the devices were semi-disguised, TheNokiaBlog claims that the Xenon flash on the back of the device was unmistakable. The theory is that Nokia used a few Lumia 928s to film the concert and is planning on showing the result to the world during or after the official launch of the handset. Sounds reasonable to us!
Unfortunately, other details about the handset seem to be quite scarce. The source kind of confirms the presence of an assist LED light, as well as the expected positioning of the 3.5mm audio jack and the microUSB or HDMI on the top.
The Nokia Lumia 928 is expected to be an exclusive Windows Phone 8 smartphone for Verizon Wireless, but nothing official regarding the handset has come out of Nokia yet. Meanwhile, Nokia's current flagship, the Lumia 920, has been on sale at AT&T since last November.