Mobile phone Redmi K40S brush the European version of MIUI can be carried out by the method of line brush. Today, you need to unlock and exit the Redmi K40S system device account ID, then backup important data, and then download a third-party system brush tool and European version of MIUI system adaptation brush package on the computer terminal, connect the Redmi K40S mobile phone and computer terminal through the data cable to brush the method of wire entry brush. You can successfully brush the European version of MIUI.