B550 build of EMUI 4.0 Android 6.0 for P8 Lite Dual SIM has been provided by the manufacturer. Although OTA upgrade is live, the users also can download the update package from the link here. Download, and then flash it via updater app to locally Upgrade Huawei P8 Lite L21 Dual SIM to Official Android 6.0 EMUI 4.0. P8 lite dual SIM with any build can be updated via this build. Follow the steps given below.

DISCLAIMER: Using this package and guide Upgrade Huawei P8 Lite L21 Dual SIM only, to Official Android 6.0 EMUI 4.0 B550 build. Also, it an official firmware and quite safe and stable. however, make sure to copy all your data before. We don’t be liable for any harm.

OTA Info:

Device: Huawei P8 Lite ALE-L21.
Firmware: Android 6.0 EMUI 4.0
Build: ALE-L21C432B550.
Region: Europe (Spain).
Required build: Any.
Status: Full firmware.

Preps| Downloads:

Perform a full backup of your personal data on P8 first.
100% Charge is recommended for smooth process completion.
USB Driver or Hi-Suite of your PC should be installed. [Download Link].

Download ALE-L21 B550 OTA for Spain |Official Link| – |Size 1.48 GB.

File Name: [P8 Lite_ Firmware_ALE-L21_Firmware_Android 6.0_EMUI 4.0_C432B550_Spain.zip].

Steps to Upgrade Huawei P8 Lite L21 Dual SIM to Android 6.0 B550.

You should first have to download the OTA B550 build from the link.
Then extract the downloaded zip file. Find “dload” folder at the contents.
Connect P8 Lite and then transfer the ‘dload’ at the root folder of microSD.
Go to P8 lite main settings > Update > tap Menu > Local update.
Locate and tap update app file from dload and do confirm to flash.
Wait till P8 Lite reboots and flashing gets finished.