Download Android stock firmware v2.3.808 for Zidoo X20 Pro TV Box from here.
Firmware details
Archive: ZIDOO_X20-Pro_N_v2.3.88_202204021652_ota-package
Model: Zidoo X20 Pro TV Box
Image file size: 568 MB
Platform: Realtek RTD1296
Update file name: ZIDOO_X20-Pro_N_v2.3.88_202204021652_ota-package.zip
Build number:
How to upgrade
First: Click “ABOUT”→”Update”→”Local update” in succession
Second: Choose the OTA zip file from you Udisk.
Verifying the ota file
Copying the ota file
When finished copy, click “Update”
Wait the updating (please don’t turn off the power)
When it finished, then the unit will automatically restart,the upgrade is success.
Reopen the About page, the Software Version is the new version now.