Taiwanese company HTC announced the One X (and the One S and One V) at the Mobile World Congress (MWC) held in Barcelona. The One X is special because it was the company's first quad-core smartphone and runs on the Nvidia Tegra 3 processor.
Prior to HTC's unveiling of its One series of smartphones, Sony announced the Xperia S handset at the Consumer Electronics Show (CES) in Las Vegas at the beginning of January. The Xperia S is now available in the UK.
Check out how the two smartphones do against each other
Display: The HTC One X features a 4.7-inch HD 720p touchscreen with a resolution of 1,280 x 720 pixels whereas the Sony Xperia S display features a 4.3in scratch-resistant TFT touchscreen. The display features 16 million colors with a resolution of 1,280 x 720 pixels.
Size: The HTC One X measures 134.36 x 69.9 x 8.9mm and weighs 130g. The Xperia S measures 128.0 x 64 x 10.6mm and weighs 144g.
Operating System: The HTC One X runs on Android 4.0 (Ice Cream Sandwich) - with HTC Sense 4 ov overlayed on top. The Xperia S, meanwhile, runs on an older version (v2.3 - Gingerbread) of the Andoid software but Sony has priomised an upgrade to Android 4.0.
Processor:The HTC One X is powered by a quad-core 1.5GHz processor (the LTE version has a dual-core 1.5GHz chip) with 1GB of RAM. In contrast the Sony Xperia S is powered by a 1.5GHz Qualcomm dual-core processor and also has 1GB of RAM.
Camera: The One X has an eight megapixel camera with AutoFocus, smart LED flash, a BSI sensor and can record HD videos up to 1080p. The camera has a dedicated imaging chip, F2.0 aperture and 28mm lens. There is a secondary front-facing camera (1.3 megapixels) offering a resolution of 720p.
The Sony smartphone has a 12 megapixel camera with LED flash and AutoFocus. It has 16x digital zoom with a F2.4 aperture. The camera can record HD video in 1080p. There is a front-facing 1.3 megapixel camera which can record video in 720p.
Connectivity: The HTC One X has a 3.5mm stereo audio jack and offers Bluetooth v4.0, Wi-Fi 802.11 a/b/g/n options. It also supports DLNA and has a micro-USB v2.0 port.
The Xperia S has USB High Speed 2.0 support and has a microUSB slot. It also supports Wi-Fi, Bluetooth and NFC.
Storage: Both smartphones offer 32GB of onboard storage.
Battery: The HTC One X has an 1800mAh battery, while the Xperia S has a 1750mAh unit.