How to Upgrade Huawei P8 GRA L09 European model to Marshmallow Android 6.0 B321 firmware
How to Update Huawei P8 (GRA-L09) to Marshmallow 6.0 B321 Firmware [Europe]
1- Download B321 Firmware Zip package on your PC.
2- Connect your phone to the computer and create a folder named ‘dload’.
3- Copy ‘update.zip’ package to this new dload directory.Take a full backup using Huawei’s native Backup app.
4- Open Settings > Updates > Menu > Local update, tap the Update.zip package and install it.