Xiaomi's Mi Mix 3 5G is one of the first 5G capable devices to hit carriers in Europe left and right, and clearly its successor is already in the works. In fact, the upcoming Mi Mix 4 5G may have already been certified by China's Ministry of Industry and Information Technology (MIIT). A new Xiaomi handset, with the model number M1908F1XE, has been spotted on the MIIT website. It has 5G connectivity. While the listing doesn't call out the fact that it's the Mi Mix 4 5G in any way, Xiaomi CEO Lei Jun has previously revealed that a new 5G device is coming in the second half of the year. And...