Here’s a step-by-step tutorial on how to downgrade your Ascend Mate 7 MT7-L09 from Lollipop (B308) to KitKat (B137SP03) using the official downgrade package provided by Huawei. After downgrading to B137SP03, you’ll be able to upgrade to the latest Android 5.1.1 Beta we recently published on this site.
