The camera also includes optical image stabilization, and is further enhanced by improvements to the Sense camera software and the ImageChip 2 image processor. As such, HTC stated that its camera design with larger sensor pixels could notably increase overall image quality, especially in low-light environments. Although these smaller pixel sizes were typically necessary to ensure that the camera sensor did not compromise the design of the phone, there were concerns that this could result in a loss of dynamic range and sensitivity, and also result in poor performance in low-light environments. Most high-end smartphones at the time of its release used 8- or 13-megapixel cameras with pixel sizes ranging from 1.4 to 1.0 µm, both of which are considerably smaller in size than the pixels found in HTC One’s UltraPixel sensor. HTC One is equipped with a 4.0-megapixel rear-facing camera module that contains a custom image sensor marketed as UltraPixel, which is composed of pixels that are 2.0 µm in size. This internal layout also allows the device to have a curved backing. Its internal components are arranged in a pyramid-like layout similar to the HTC Butterfly and HTC Windows Phone 8X with larger components (such as the screen and battery) positioned towards the front and smaller components (such as the motherboard) positioned towards the back. Most HTC One models come with either 32 or 64 GB of internal, non-expandable storage-unlike the international model, the Chinese and Japanese models include a microSD slot and a removable back cover. The chip provides support for LTE networks where they are available. Internally, HTC One is powered by a 1.7 GHz quad-core Snapdragon 600, an ARMv7 SoC, with 2 GB of RAM. At the bottom is the primary microphone and a microUSB port for both data connections and charging the device can stream HDMI via the microUSB port using MHL 2.0. At the top of the device is a 0.14-inch (3.6 mm) headphone jack and the power/lock key, which also functions as an infrared blaster. The backside of the device houses the camera, the LED flash, and the secondary microphone.
HTC One uses a 4.7 inch, 1080p Super LCD 3 touchscreen display with a pixel density of 468 ppi.