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References
http://forum.xda-developers.com/showthread.php?t=2433454
http://www.needrom.com/download/huawei-ascend-mate-7-mt7-l09/
http://www.daviddosa.nhely.hu/en/2016/04/05/using-huawei-update-extractor/
https://boycracked.com/2016/02/12/easy-guide-to-unbrick-update-firmware-any-android-devices-via-fastboot-mode/