This happens if the "8223" driver isn't initialized in the firmware script.
If you have located the .tgz or .rar file containing this specific build, the installation process for WM8850 devices is unique:
Since these files are no longer hosted on official servers, your best bet is searching specialized forums like or Slatedroid , specifically looking for "WonderMedia WM8850 Uberoid" or "Eken W70 Firmware." Do you have the firmware file already, or wm8850 mid7 puzhi w01 8223 ft5206 w70 wmc15797z upd
Once it reaches 100%, it will tell you to remove the SD card. The tablet will reboot into a fresh installation of Android (usually version 4.0.3 or 4.1.1). Common Issues & Troubleshooting
Often refers to the specific LCD panel or the firmware build version. This happens if the "8223" driver isn't initialized
Refers to the Wi-Fi chip (likely the Realtek RTL8188 or similar).
Turn the tablet completely off. Insert the SD card and turn the tablet on. Common Issues & Troubleshooting Often refers to the
Each part of that keyword represents a critical hardware component. If you try to flash firmware that doesn't match these exactly, the touchscreen or Wi-Fi will likely stop working.
Use a card 8GB or smaller, formatted to FAT32 .
Stands for "Mobile Internet Device" with a 7-inch screen.