OnePlus
X

At launch, OnePlus described the X as a “smartphone line that fused sleek design with flagship level performance.” OnePlus CEO, Pete Lau, called it “a design centric device that was chic and powerful enough to fit any lifestyle”. The phone was offered in an onyx black glass variant (featured in the Mobile Phone Museum collection) and a limited edition ceramic model. The onyx version used black glass mounted on a metal bezel and the company stated that “every glass backplate was cut to size and polished repeatedly until it achieved a smooth, glossy, mirror-like finish”. At the time it was the lightest and slimmest OnePlus device to date. The Ceramic version had a manufacturing process that took more than 25 days to complete. This started with a zirconia mould that was just 0.5 mm thick. The ceramic was fire­-baked up to 2,700°F for more than 28 hours before being cooled for two days. Each individual OnePlus X backplate then underwent three methods of polishing. The phone was scratch-resistant with a hardness of 8.5H on the Mohs scale and weighing 160g. The OnePlus X featured a 13-megapixel rear camera with an f/2.2 aperture, a Qualcomm Snapdragon 801 processor and a 5-inch 1080p active-matrix OLED display (the first time OnePlus had used an AMOLED display).At launch, the onyx black glass variant cost €269 ($249) and the ceramic edition cost €369. Only 10,000 OnePlus X Ceramic devices were manufactured.