Download V801s Core4_v1.0.1_v9 firmware for Onda V801s Tablet from here or from here. Download previous firmware from here. If you have another Onda tablet then search here your firmware.
Firmware: V801s Core4 v1.0.0_v9
Image file name: V801s Core4 v1.0.0_v9.img
Model: Onda V801s Core4 Tablet
Image file size: 484 MB
Platform: Allwinner A33
Build number: astar_inet-eng 4.4.2 KVT49L 20150112 test-keys
FW version: 2.1_20141227 / A33_U680C_U802L6C_20150112
Pixels: 800 x 1280
ADS HERE !!!