Since the official Eken site is no longer reliable for legacy drivers, check these community-maintained repositories:
Firmware is the software that controls your device's hardware components, dictating how they interact and function. Upgrading or modifying your firmware can significantly enhance your device's performance, add new features, and fix bugs. However, it requires careful consideration and execution to avoid potential risks. eken+w70+v20+wm8850+firmware+link
After the tablet boots into Android, you may remove the microSD card. The wmt_scriptcmd and FirmwareInstall files can be deleted from the card. Since the official Eken site is no longer
Because the W70 and V20 are reference designs, you can sometimes use a generic WM8850 firmware from a different brand (e.g., Ployer MOMO or Chuwi V7). Search for: generic_wm8850_800x480_4gb_20131120.img add new features