2: then copy the entire dload directory to the root directory of the SD card. Ensure that files such as updates exist. The APP in the dload directory as shown in the figure below (note that it must be the root directory or it cannot be swiped).
3: Make sure the phone is fully charged. Then, when the phone is turned off, press the volume up key+volume down key+on/off key at the same time, and the phone will automatically enter the upgrade mode, and then start the upgrade.
4: There is a progress bar during the upgrade process. The progress bar is gone, and it will be ok after the phone is restarted.
5: At this point, Huawei Maimang 6 brush machine course is over.