It turns out that a new variant of the Nokia Lumia 920 is expected to come to MWC code named Nokia Catwalk. This will be a thinner device than the Nokia Lumia 920 with an aluminum body. There also is another rumored new high end phone code named the Nokia Laser which is a Windows Phone model with the same 41MP camera sensor as seen on the Nokia 808 PureView. Both of these models are supposedly Verizon bound which means either phone could be the one at the FCC.
How do we know that the model that Mendelovich tweeted about was at the FCC? Because a diagram of the device that came from the FCC revealed the same RM-860 model number that is mentioned in the tweet. Take a look at the diagram above the tweet in the picture that accompanies this article.
source: TheNokiaBlog via Engadget