Xiaomi sub-brand Redmi is set to unveil its first ever flagship smartphone, the K20 Pro, on May 28. This phone has been leaking like crazy, and Redmi GM Lu Weibing has been slowly drip-feeding us information about the upcoming device codenamed "Demon King". In the latest such Weibo post, Lu Weibing reveals that the K20 Pro will have a headphone jack as well as Hi-Res Audio certification. With all this talk about the K20 Pro, we've almost forgotten that there's a non-Pro K20 coming too. Thankfully new information from China claims to shed light on what the main difference between the...