A photo allegedly showing the Sony D6503 reveals a device similar in appearance to the Sony Xperia Z1, but with thinner side bezels. This leads to the possibility that the phone sports a 5.2 inch screen. The bottom of the device has three large speaker holes instead of the mesh speaker grille found on the Xperia Z1. The Micro USB and SIM ports are on the left side and the microSD slot is on the right side. And the lanyard is now also on the left side instead of the right side as on the Xperia Z1.
According to the source of the leak, the D6503 is coming soon, which means we could hear more about this device before next month's MWC in Barcelona. Meanwhile, to comfort you until then, we have a series of photos that you can look at in the slideshow below.
source: XDA via XperiaBlog