Lei Jun, founder and CEO of China's mobile company Xiaomi, speaks at a launch ceremony of Xiaomi Phone 4, in Beijing, July 22, 2014. China's Xiaomi unveiled on Tuesday its new flagship Mi 4 smartphone, aimed squarely at the premium handset market dominated by Apple Inc and Samsung Electronics Co Ltd. Design And Display The Xiaomi Mi Note and the Xiaomi Mi Note Pro measures 155.1 x 77.6 mm and its thickness is 6.95 mm.