Nokia 603/RM-779 with Symbian Belle found in User Agent header file
Yesterday it was the Nokia 900 Windows Phone, and today we have the Nokia 603 which is believed to be running Symbian Belle. We can call it a confirmed device as the details have been leaked from a user agent XML header file from Nokia.com itself.
The specs from the XML file say that the handset will have Symbian Belle, 360×640 resolution display, Wi-Fi, HSDPA, EDGE, and two soft keys (probably capacitive keys). Check out the full XML file over here.