Download latest Android KitKat 4.4.2 Stock Firmware for Vido M80 / YuanDao M80 tablet ZB model from here or here. Download the firmware for AZ model from here.
Update file name: M80-4.4-20140909-ZB
Archive size: 513 MB
Model: Vido M80 / YuanDao M80 tablet ZB model
config_version: V1.1.2
Platform: Mediatek MT8127
Project: esky27_tb_ccn_kk
ADS HERE !!!