[Device Reviews and Information] reg66:
Perquisite: Copy CherishOS img (MINIMAL GAPPS ARE included in this build) and mod.super.gsi….V2.img to microSD card and insert it

Also, be sure that you are wiped and running latest ROM version (see last steps for ntoes on how to flash if you aren’t already on latest)and check that your device is recognised in fastbootd using correct drivers. There's some supplied in mega link, but i can't recall which ones worked for me!

[On PC/laptop] Download (recently added) Utility-T1020S_v02.rar, CherishOS img and mod.super.gsi….V2.img from the mega linked before (this link)

[PC/laptop] Unzip (using 7zip etc) any rar/zip files.

[Device] Assuming (can’t recall, but it’s most likely) device got wiped during BL unlock, skip any setup options. ALSO ASSUMING you are on the LATEST STOCK ROM. Connect device to PC/laptop. (See 'NOTE' at the end of this post for flashing stock rom).

[device] Enable dev options on device (settings/about device/build number, tap 7 times. Settings system/advanced/dev options and enable USB debugging again. Click to allow USB debug connection when prompted on device screen.

[PC] GO to the extracted Utility-T1020S_v02 folder and double click run.bat file.

[PC] Once loaded Utility-T1020S_v02 SHOULD show your device serial under ‘list of devices attached’

Select option 1 and hit enter, then option 0 for fastbootd and enter. Device should now reboot to fastbootd. Hit enter again to return to main menu. Select option 3 and enter. Should get flashing messages in Utility-T1020S_v02 window. Keep window open for later…

[Device] Use vol buttons to navigate, power to select. Scroll to reboot to recovery, hit power button.

[Device] In recovery wipe data/factory reset.

[Device] Wait a few mins for reset to happen (should get a message of Data wipe complete (probably with errors listed too, no worries)

[Device] Reboot to system. (NOTE, I haven't had much luck in booting to recovery/TWRP directly from buttons combo’s so… step 12)

[Device] Once booted. Skip setup, go to settings and re-enable dev options, then USB debugging, allowing USB debug connection option on device.

[PC] Return to main menu in Utility V2 window (press enter to return to main menu and check your device serial is still showing) and choose option 3 to reboot to recovery - TWRP will boot.

[Device] In TWRP, click ‘install’, go up a level and scroll to ‘external sd folder’, click ‘install image’, navigate and choose mod.super.gsi img and flash to Super partition.

[Device] Back button to homescreen of TWRP. Wipe option wipe/format, typing ‘yes’ and wait a while (can take a fair while to wipe)

[Device] Back to homescreen, reboot to recovery.

[Device] Once rebooted, select install, select install img, navigate external SD and CherishOS.img and flash to System partition.

Done. Reboot to system. It reports NO OS (operating system) installed, ignore that and swipe to boot anyway.

Device will hang on ALLDOCUBE splash screen for maybe 1-3minutes before you see the CherishOS screen. Finished… Good luck.

NOTE: To return to stock (iPlay40(T1020S)-EN-20210526 stock rom is included in above mega download folder) use ReseachDownload folder from mega link along with Research Download Tool Guide.doc.

Any problems just reply and I'll try and help, although I will be listing my tablet on eBay this weekend!! I'll try and help if I can though...