The Nexus 4 is found to be packing all sorts of LTE surprises. First the device was said not to feature LTE but the chip was found inside the device. It was soon found out that the handset could indeed take advantage of LTE in certain areas in Canada after a simple mod to enable LTE on the device. Now it looks like if you live in an area that has Band 4 LTE from AT&T, your Nexus 4 can take advantage of those faster speeds. Check out this thread over at the XDA for more information and how you can try this on your device.