Xiaomi introduced the Mi Band 4 earlier this month with a color display and better sports recognition. The device impressed the audience in China so much, over 1 million units were sold between June 14 and June 21, a total of eight days. The rest of the world is yet to see the device that will launch on June 26 and will be sold as Mi Smart Band 4 in Europe. The official poster, announcing the 1 million milestone Xiaomi reported that there were over 5,000 shipments per hour at one point, making it the fastest-shipping wearable by the company, ever. It now comes with a bigger OLED...