Hello Guys,
This Is very interesting discussion. I own another Teclast P85Kids tablet, I filled more details about it on Sunxi commnity web site https://linux-sunxi.org/Teclast_P85Kids_ROW.
I am wondering if these SoCs(A733, A533, A333) have still build-in a boot room with capability to load uboot-asl from a properly formated SD card. Not sure, about Its rooting and possibility to download android firmware files from Teclast // or how to perform a complete device back-up once it's rooted. Not sure also about any community effort related to recovery and (multi OS) boot tools (have Android&Linux side by side).