Hard Reset on Huawei MT7-L09

How to Hard Reset on Huawei MT7-L09 Ascend Mate 7 LTE-A?

Make sure you turned off the device.
Hold down the Volume Up and the Volume Down keys.
Meanwhile, press and release the Power button.
Wait until the Android logo appears and then release the keys.
Next select "wipe data/factory reset".
To do so, use the Volume Down key to navigate and the Volume Up key to select.
Choose "Yes - delete all user data" using the same keys.
Press "reboot system now" to finish the process.
That's all! After a Hard Reset, the memory of your phone cannot be restored.