Huawei P8 Lite ALE-L21 Altice variant has been upgraded to B541 version of marshmallow firmware. Users with cust version C33 can install this firmware by following the guide given below.

• This update improves system security with Google security patches.
• Integrates Google security patches for improved system security.

Huawei P8 Lite ALE-L21 Altice

• Firmware Download Link : Huawei Server | Alternative Link
• File Download Size: 1.40 GB
• Build Number: ALE-L21C33B541
  
• Supported Model: ALE-L21C33 (Altice Only)
• Update Type: Full OTA

Installation Guide:

• Backup all important data
• You should have 4 gb free space
• Charge battery up to 50%
• Your phone should not be rooted.
• Make ” dload ” folder on sd card/Internal storage
• Extract update.zip and copy update.app to dload folder,
• Go to settings>updater>menu>local update, then select update.app to install update.
• Or 2nd method is switch off your phone and hold 3 buttons (volume up, volume down, and power) until you see update start screen.
• Done