Turn off your device.-Keep Pressing both keys together (Power Key + Volume UP Key).-Release only (Power Key) after you see “HUAWEI” logo on your screen, while keep pressing the (Volume UP) key.-Release the (Volume UP Key) once you see logo “EMUI”.-Tap on “Wipe DATA/Factory Reset”.-Again tap on “Wipe DATA/Factory Reset”, after that type “YES”.-Now you have to tap again on (Wipe DATA/Factory Reset > Wipe DATA/Factory Reset).