Design
The HTC One X is a great-looking phone. The white polycarbonate body makes the phone lightweight without compromising durability, and the 4.7-inch 1280-by-720-resolution Gorilla Glass display should be roomy enough to accommodate even the pudgiest of fingers. Though the phone packs a large screen, it never felt too big to hold, and I had no trouble slipping it in or out of the pocket of my jeans.
Besides the aforementioned screen, the front of the phone also holds a set of three hardware navigation buttons (Back, Home, and Recent Apps), as well as a 1.3-megapixel front-facing camera. One the back is an 8-megapixel camera (more on it later), and a set of pin connectors for hooking up the One X to compatible accessories, like a car or media dock. The power button sits comfortably at the top of the phone, right next to the microSIM card slot. During my time with the phone, I found that excessive shaking could cause the SIM card to jostle in its slot, making the phone think that the SIM card had been removed. This shouldn't be a problem for most people, but if you use your phone while running, you could encounter some issues.
Performance
Whereas the ships with an Nvidia Tegra 3 quad-core processor, the AT&T version is powered by a Qualcomm 1.5GHz dual-core Snapdragon S4 processor. The reason for this is that the dual-core S4 supports LTE connectivity while the Tegra 3 did not at the time of manufacturing. Despite the fewer cores, the One X is an utter beast when it comes to performance: Apps all ran buttery-smooth, and the phone never once stuttered or stalled when running even the most graphics-intensive games.