Sony has announced its latest flagship smartphone, the Xperia 1 V. At first glance, it doesn’t look too different from the Xperia 1 IV that proceeded it, with its tall 21:9 display, vertical row of rear cameras, and sensible squared off design. But internally it’s using a new “Exmor T for mobile” sensor for its main camera, which Sony describes as a “2-layer Transistor Pixel stacked CMOS image sensor” that’s 1.7 times larger than the sensor in last year’s model. Sony claims…