To make sure that the power of the battery is enough to run the upgrade process. Maybe you may connect the handset with the charger or the USB data cable to provide power
💡 Remember ! when you hard reset to your smartphone, you must backup your all data, because after hard reset you lost your all important data from internal memory.We provide a link how to Backup Android Device
Step 1: Download the Huawei ROM Flash file FROM HERE, There is no need to download it again if you’ve already downloaded the latest ROM file.
Step 2: Copy the package which is named update.zip to sdcard If the package name isn’t update.zip, please rename it.
Step 3: Insert the sdcard into the handset and power on. After entering the home screen, go to Settings->about phone-> Local Update-> Confirm -> Confirm to start the upgrade.
Step 4: When the progress bar stop, the phone will restart, if not you need to remove the battery and start it manually.
Step 5 : Done !
We made a video to clear this tutorials ! Please watch this video to upgrade your device easily !