Huawei Ascend Mate 7 MT7 L09
Important Note: This is an incremental OTA that requires an unrooted device with stock recovery and unmodified System partition (no Xposed). Make sure that you have the European MT7-L09 model that’s already running B560 firmware onboard. You proceed entirely at your own risk!
Copy the update.zip package to the external microSD card of your device – place it inside a folder “dload create one if it isn’t already there).
Take a backup of your existing data using Huawei’s Backup app.
Unplug the USB cable and open the dialer app.
Dial *#*#2846579#*#* to open the Project Menu.
Go to Software Upgrade SDCard Upgrade and confirm update installation.
If the update isn’t found, you may want to place the update.app file present inside this Zip package into the dload folder instead – but it isn’t recommended since there’s a chance of your phone getting bricked. You’ll be better off using the full firmware package with fewer compatibility issues
download to link
click to read download