You can now restore your Ascend Mate 7 (MT7-L09) from the new Marshmallow update back to stock Lollipop firmware using the official transitional firmware, build B500, released by Huawei.
- Device: Huawei Ascend Mate 7
- Model: MT7-L09
- Codename: Jazz-L09
- Android: v6.0 → v5.1
- Firmware: B500
- Build Number: MT7-L09C900B500
- Release Date: 5.05.2016
- Region: Europe
- Branding: WEU Generic
- Type: Transition firmware
- Status: Official
- File Name: Mate 7 (MT7-L09)_rollback transition package_From Android 6.0 to Android 5.1.zip
Download Link: Official Mirror | Size: 261.76 MB
How to Downgrade
Step 1: Download the transition firmware package from above and extract it.
Step 2: Copy the extracted dload folder to your phone’s internal memory (top-level directory).
Step 3: The rollback process will wipe out all the data stored in the internal memory, so do remember to take a full backup first.
Step 4: Turn your phone off. Now reboot while holding Vol down + Vol up + Power for a few seconds till the installation starts.
Step 5: Once your device powers up, go to Settings > About Phone and confirm that the firmware version is now B500.
Step 6: Now download the appropriate Lollipop like B331, copy its Update.app to internal memory and install it the same way as above.
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