Since Lei Jun wrote such words “304 austenitic stainless steel” in his Weibo, notions that Mi4 would have metal back covers have constantly come into being, which now is denied officially.
Wanqiang Li(co-founder and CEO of Xiaomi )stated in his Weibo, “Although stainless steel is used in new products, it is not used in Xiaomi Mi4‘s back cover. What’s more, Wanqiang Li announced secret gifts for Audience that will come to Mi4’s press conference would be Xiaomi router mini and F codes(which allow you to be the first one to buy Mi4 ). Also, he claimed it’s impossible to give away Mi4 for free.
