The Xiaomi Mi 4 has been on the market for a while. Now, there is the issue of how much is in stock. This afternoon, Xiaomi CEO, Lei Jun, said in his Weibo account that over 1 million Mi 4 phones should be in stock by the end of the month. Not only that, he expects 1.5 million phones to be finished by next month. He said that since the Mi 4 is made using stainless steel architecture, the production process is easier.