This is a holder plate for the universal car mounts. This should fit the Xperia T well. 2013-10-05: New closed version of the mount, the slim version in PLA will likely melt in your car. Mine did. So after having used the mount for a few months, and the temperature having gone down I redesigned it to be a bit more sturdy. It fits the phone here ok, but the amount of space around the camera could be better. It needs little effort to release from the dock, make the top beams thicker to increase spring rate. I designed it using Autodesk Inventor Fusion which still appears to be free and works pretty well. I needed a landscape mount for the phone which explains the "awkward" positioning. I use the phone for dashcam recording whilst on the road, and this makes more sense.