Download Android Jelly Bean 4.2.2 Stock Firmware for Vido N70 3G / YuanDao N70 3G tablet from here or here. Download previous firmware version from here. Download another Vido / YuanDao firmwares from here.
Update file name: T3-A4.2-20140805-CZ
Image: YD_MR706Z_T3_CZ_0526
Archive size: 445 MB
Model: Vido N70 3G CZ / YuanDao N70 CZ tablet
Model: Vido N70 3G CZ / YuanDao N70 CZ tablet
config_version: V1.1.1
Platform: Mediatek MT6582
project: mr706