Download latest Android KitKat 4.4.4 stock firmware for Onda V820w tablet from here or here. Download previous firmware from here. Download another Onda firmware from here.
Archive: V820w DualOS_32_20150126
Firmware: Android KitKat 4.4.4
Model: Onda V820w tablet
Archive: V820w DualOS_32_20150126
Firmware: Android KitKat 4.4.4
Model: Onda V820w tablet
Image file size: 520 MB
Platform: Intel Bay Trail Z3735F
Build number: inet_w_32-userdebug 4.4.4 KTU84P eng.inet_rance.20150126.194244 dev-keys
Build number: inet_w_32-userdebug 4.4.4 KTU84P eng.inet_rance.20150126.194244 dev-keys