yashsingh1/xdaforums huggingface dataset:
[Device Reviews and Information] AllexBast:
Yes. lineage-17.1-20210808-UNOFFICIAL-treble_arm64_bvS.img.xz.

ModSuper is needed to disable disk encryption and install custom firmware. Perhaps someone will make a normal TWRP with the function of decrypting partitions, but this is difficult without the sources.

I plan to upgrade vendor.img for android 11 firmware, but I don't understand how to do it yet.
[Device Reviews and Information] AllexBast:
https://xdaforums.com/t/teclast-m40-how-to-unlock-bootloader.4185363/post-85481195 Here I described the process of disabling encryption on the stock firmware .
[Device Reviews and Information] Apple292:
Before I try to install a custom rom, is there a way to access fastboot/recovery without booting into the OS?
[Device Reviews and Information] AllexBast:
On the stock firmware, it was possible to enter the service menu in Chinese. To do this, turn off the tablet, then hold down the power button and the volume up button. As soon as the image appears on the tablet, release the power button, wait 3 seconds and release the volume up button. The lowest point is hard reset. If twrp was stitched on the stock firmware, then you could get into it using this item. With modified super.img for gsi, only black screen appears. You need to find out what kind of application it is and flash it through twrp.
[Device Reviews and Information] AllexBast:
Regarding the GSI firmware that I recommended to you. The first sim card works, I called like from a phone, 2 slot I use microsd samsung 128gb. There is no sound when connecting bt headphones, I do not know how to fix it.
[Device Reviews and Information] Cartmannnn:
Thanks for the reply. I tried the cpu monitor app and it give me the same reads like yours, all time between 30% and 90% at idle, but no shutdowns, even playing games its the same. Other thing i have notice is that iplay 40 have no cpu sensor for thermal monitoring, only in the battery itself and the thermal readings from the cpu monitor app are wrongs, cause sometimes gaming get me less temperature than at idle and other persons in the play store reviews say the same thing, the temperatures the app are showing are wrong.
[Device Reviews and Information] White_Spot™:
Ok, after some days using the tablet I can almost confirm the problem is solved.

The CPU Monitor app give some misleading information. Using Simple System Monitor the information is more precise and leaving no doubt that the CPU is not always at + 90%. Using this app I see that the CPU is not overcharged to make an temperature increase that justify the shutdown.

Yes Cartmannnn the tablet only have a battery temperature sensor, so the error is about the battery being to hot and not the CPU.

So in one of my attempts I disconnected the battery and tried to boot the tablet only powered by the power cable. The tablet boot's up but don't pass the Alldocube logo and restart again.

I open a old iplay 10 with a broken glass that I have to see if I can exchange the battery but the iplay 10 have a battery with only two wires and they are soldered.

So I plugged again the battery, booted the tablet and installed the Battery Repair Life app. It give some minor errors that the app repaired (1% of low cell's, 5 cell's in total).

After that I manage to play a long time in Asphalt 9, but as I was not sure the problem was away I let my daughter use the tablet some days and until today no more error's showed and none shutdown.

So in the end what was the problem? I think it was an erroneous information stored in the battery (or in the battery /charging circuit) and the fact I have unplugged it solve the problem, or the battery repair app solve the problem. What cause this? Maybe one of the updates the tablet make or the battery come this way from factory.

Many thanks to all that have helped and I hope other can solve the similar issue like I do.

P.S. I do not have installed the lineage so, maintain the original Alldoccube SO.
[Device Reviews and Information] Cartmannnn:
Thanks for the info.
[Device Reviews and Information] Apple292:
You should make a new post on how to install a custom rom, as it isn't very clearly shown anywhere on the internet.
[Device Reviews and Information] White_Spot™:
I forgotten, I have installed also AccuBattery app before the Battery Repair Life app. As it not give me any "special" information I installed after the Battery Repair Life app.

So in the end I don't know if any of these app are related to solve the problem or not, or the solution was only disconnect the battery.
[Device Reviews and Information] davovapo:
Hi, I'm also trying to unlock the bootloader of my t1020s but without much luck. I used AllexBast chinese guide and its .apk to get the signature.bin but the command "fastboot flashing unlock-bootloader signature.bin" always fails printing "fastboot: usage: unknown 'flashing' command unlock_bootloader". Did something similar happen for you? Any ideas? Thanks in advance.
[Device Reviews and Information] White_Spot™:
Yes, the fastboot file was to be a specific one. I can't remember where I get the correct one (my work folder is a mess with many files) but eventually is one from the links he give.

Go and try different fastboot files until one works.
[Device Reviews and Information] AllexBast:
try these drivers

Universal ADB Drivers

Fastboot

https://xdaforums.com/t/tool-windows-tiny-adb-fastboot-august-2021.3944288/
[Device Reviews and Information] davovapo:
Thanks to both, I unlocked successfully the bootloader using the fastboot file from AllexBast linked juseblog guide, I added the file here in case somebody needs it too and just to note it the unlocking process took around 12 minutes. Now I'm trying to follow AllexBast steps, I followed the "flash to rd" guide and worked great but when flashing the recovery with "fastboot flash recovery recovery.img" it seems to be stuck at "Writing 'recovery'..." I may leave it for some more hours or overnight to see if it actually works.
[Device Reviews and Information] AllexBast:
You need to flash all 3 files:

fastboot flash recovery recovery.img

fastboot flash boot boot.img

fastboot flash vbmeta vbmeta.img
[Device Reviews and Information] davovapo:
Flashing boot, vbmeta and finally recovery worked, now I can access TWRP. I can't seem to find my files on TWRP though to flash zips, etc, I imagine it's the encryption. I tried to install the ModSuper file super.new.img through "flash super super.img" in fastmode, it seemed to work ok but it entered a bootloop in which I had to reset the device firmware to be able to boot normally again. If I figure out something I'll update, thanks again.
[Device Reviews and Information] AllexBast:
Unfortunately in this twrp there is no reboot point in recovery. But twrp supports ADB commands, so after format data is yes, you need to reboot in recovery using the adb reboot recovery command. Modsupergsi, gsi and gapps are flashed via twrp. Need micro sd card.

TWRP supports mtp, perhaps you can copy the file to the tablet memory after flashing fastboot flash super modsupergsi.img, format data-yes, adb reboot recovery and do without microsd
[Device Reviews and Information] davovapo:
I installed the new super.img from your post, formatted, rebooted back to recovery but then when I try to install lineage-17.1-20210808-UNOFFICIAL-treble_arm64_bvS.img it fails due to img being too large as you can see in the attachment (not the correct img maybe?) which made me reset the device again. I could install Magisk like White_Spot, that worked well as long as you back up and restore the boot as you pointed out.
[Device Reviews and Information] AllexBast:
Is that how you formatted it?
[Device Reviews and Information] davovapo:
I formatted data - yes indeed. I'm attaching pictures of the process.
[Device Reviews and Information] AllexBast:
Sorry, I gave the wrong link modsupergsi. Here is the true

super.treble2product.rar

drive.google.com
[Device Reviews and Information] davovapo:
No worries, thank you for the support, but now I formatted data and tried again with the new modsupergsi and it shows the same "Size image is larger..." error when trying to install in section super.
[Device Reviews and Information] AllexBast:
To avoid confusion, flash the stock firmware research download via and repeat all operations on a new one
[Device Reviews and Information] davovapo:
Just to make sure I'll write it all down, thanks again for your patience.

So I'm using the official firmware iPlay40(T1020S)-EN-20210526 pac file with ResearchDownload. It works great, then I boot it, activate usb debug in settings, go to fastboot and flash boot, vbmeta and recovery. Then I reboot so I can go to recovery with adb and in recovery it's when I try to install the super.treble2product.img in section super. At this point the error of the last pic with "Size larger..." appears. As I understand, I am installing super.treble2product.img on stock firmware here.
[Device Reviews and Information] AllexBast:
Make format data in twrp on stock firmware.

If you fail to flash, then open super.treble2product.img in the hxd editor and at the very end delete the zero values of a few kilobytes.
[Device Reviews and Information] davovapo:
Alright, I went through it again, I'm updating the steps I wrote before, I'll keep trying till I get it or brick it:

So I'm using the official firmware iPlay40(T1020S)-EN-20210526 pac file with ResearchDownload. It works great, then I boot it, activate usb debug in settings, go to fastboot and flash boot, vbmeta and recovery. Then I reboot so I can go to recovery with adb, I format data - yes and adb reboot recovery. Again in recovery it's when I try to install the super.treble2product.img in section super.

At this point the error "Size of image is larger than target device" still appears.
[Device Reviews and Information] AllexBast:
If you fail to flash, then open super.treble2product.img in the hxd editor and at the very end delete the zero values of a few kilobytes. The file must be glued without this block of zeros in order to reduce the size of the image.

HxD - Freeware Hex Editor and Disk Editor | mh-nexus

The fact is that I hurried to upload the files and did not fix the errors. But since no one wanted to test this version of the firmware, I did not double-check anything. Now I have neither a tablet nor a laptop. Therefore, I cannot check and re-upload the files.
[Device Reviews and Information] davovapo:
That did it! Thank you so much AllexBast, lineageOS17.1 is installed with gapps pico following the rest of your steps. I bought this tablet without knowing much about its custom rom support and I'm glad we are able to change the OS at least, I learned quite a bit. Now the next goal would be A11 or even 12, I'd like to know more into making custom roms and see what I find and how overwhelming it is, probably a lot.
[Device Reviews and Information] AllexBast:
For now, check out the latest builds for Android 10 here https://xdaforums.com/f/treble-enabled-device-development-a-ab-roms.7260/
[Device Reviews and Information] RedNas74:
I'm trying to unlock the bootloader, but i get an error from fastboot:

fastboot flashing unlock_bootloader signature.bin

fastboot: usage: unknown 'flashing' command unlock_bootloader

What am I doing wrong? I enabled oem unlocking in developer options and generated the signature.bin
[Device Reviews and Information] AllexBast:
use a different version of botloader
[Device Reviews and Information] RedNas74:
Managed to get it working with the fastboot files from davovapo. Thanks for the quick answer.
[Device Reviews and Information] lowfatmilk:
i apologize beforehand if this is too off topic:

Does this TWRP recovery work with the iPlay 40 Pro with its Android 11?
[Device Reviews and Information] AllexBast:
does not work
[Device Reviews and Information] lowfatmilk:
Thanks for the info! It'll save me some grief.

Are there plans to make a TWRP for the iPlay 40 Pro/H then? Don't think i'll try to root the thing before there's a custom recovery for it.

Prolly needs its own thread, to unburden this one of off topic discussions.
[Device Reviews and Information] AllexBast:
Were you able to unlock your tablet?
[Device Reviews and Information] lowfatmilk:
Haven't tried. No reason to until there's a custom recovery that works for it, for the iPlay 40 Pro/H.
[Device Reviews and Information] Burs:
Three questions if someone knows..

1) Does anyone have issues with finding hidden SSID WiFi networks? I enabled the option in settings, but the tablet still cannot find it? Other devices find it without problem. As soon as I configure SSID as visible, it works without issue. Never had such weird case.

EDIT: in order to connect to WiFi network with hidden SSID, one don't even have to configure network as Hidden, and Android handles the configuration properly and make the network visible (opposed to how it was working on previous versions like Pie). If you explicetely configure the network is Hidden (and it is), then the network cannot be found. Sad, but true. Took me some hours to figure out that.

2) It seems tablet doesn't have 5Ghz WiFi support, despite it advertises itself like it's capable to connect to such networks. All my other devices doesn't have this issue, but I cannot see/connect to my 5GHz network no matter what. I use XIaomi AC2100 router which provides both 2.4/5Ghz AP, and this is the first device I have issues when connecting it to that router.

EDIT: this still confuses me. Judging by the specs, WiFi chip should certainly support 5Ghz WiFi networks. Why my tablet cannot connect to such network is beyond my understanding. Anyone?

3) Did anyone flashed "iPlay40(T1020S)-EN-20210526" update from official Alldocube website? Is that Android 11 inside? It weighs at 1.32 GB, so I guess it's some major upgrade? Or is it just fully Android 10 system image?

EDIT: this I won't even try, as I didn't find any other Android 11 images out there. Frankly, this Android 10 is working very well, and I don't really care what if it's 10, 11 or 12.

Right now I'm updated to 20210525, and everything works fine (expect issues above), so if Android 10 provides better performance and experience, I'll leave everything as it is.

Thanks everyone.
[Device Reviews and Information] White_Spot™:
2) Mine as always connected to 5Ghz wifi so I can´t help you.

3) I think is the complete system and not only an upgrade.
[Device Reviews and Information] RedNas74:
3. iPlay40(T1020S)-EN-20210526 is the same as the version you're already running. I flashed it and in about phone the build number is T1020S_V1.0_20210525.
[Device Reviews and Information] Burs:
Thanks guys. I'll google some bit more about connecting to 5Ghz WiFi networks. I have some specific apps where I prefer speed over range, so I would like to use 5Ghz. In the meanwhile I've also set up 5Ghz AP on my mobile, and I cannot connect to it either (while other devices can). There isn't any specific option compared to 2.4Ghz, so it should just work. But it doesn't. I also checked WiFi specifications with AIDA, and it indeed shows 5Ghz as supported. I thought maybe different WiFi chip ended up inside my tablet (hint: chip shortage), and I also had similar cases with Chinese tablets in past where manufacturers put different components and claiming it's the same exact model as everyone else have. So it wouldn't be the first time.

One more quick question: do your tablets shut down automatically when battery reaches 15%? I just had quick notification saying battery is low, and few seconds later it just shut down. I know it's not good for the battery to be depleted completely, but I would like to have some time to finish what I was doing, then shut it down myself, or at least have time to grab a charger. And no, it wasn't like the battery was completely depleted, because when I connected the tablet to charger, it was showing 14-15% and charging. AIDA also shows battery's declared capacity is 6000mAh, so I doubt it's anything related to it.
[Device Reviews and Information] White_Spot™:
So my daughter last day tell me the tablet as started to shut down again with the temperature error as in the beginning.

Using Simple System Monitor app it is possible to see the temperature rising and after a while the tablet shutdown.

Using the Battery Repair Life app, no problem was detected to the battery. I have again unplug the battery to see if it solves the problem, but I have no time to test it yet.

Today or tomorrow maybe I have a little time to test again if unplug the battery was the solution to this problem.
[Device Reviews and Information] Mad_god44:
so I'm having the exact same problem and I have no idea how you unlocked bootloader so how did you unlock it?
[Device Reviews and Information] RedNas74:
You need the fastboot version from this post and it will work.

https://xdaforums.com/t/alldocube-i...-some-minor-compromises.4212541/post-85671645
[Device Reviews and Information] Mad_god44:
Those are the fastboot files I've already tried and still says the same thing
[Device Reviews and Information] ar_aja:
I was successful thanks to previous comments, these were the steps and files:

-Extract files in a folder

-Go inside the "adb-fastboot" folder, in the address bar write "cmd" and hit enter to open a terminal

-Run

adb shell getprop ro.serialno

-Copy and Install SpreadTrumTools.apk in your tablet

-Open the app, allow permissions and input the serial you just obtained

-Tap Generate

-Copy the file "signature.bin" inside the adb-fastboot folder in your computer

-In the terminal run

adb reboot bootloader

-Wait for the tablet to boot into fastboot, if for any reason boots into fastbootd, navigate to reboot to fastboot

-In the terminal run

fastboot oem get_identifier_token

-Run

fastboot flashing unlock_bootloader signature.bin

-Follow instructions in your tablet (press volume down)

-If everything is successful you should see something like this

Hope it works for you
[Device Reviews and Information] ar_aja:
Can someone clarify these steps a bit?

I've tried flashing twrp but everytime i send the commands

fastboot flash recovery recovery.img
fastboot flash vbmeta vbmeta.img

takes ages (upwards of 3h each) and i cant boot to twrp anyways
[Device Reviews and Information] AllexBast:
Easier to flash via ResearchDownload (RD).

Replace three files boot.img, recovery.img, vbmeta-sign.img in the unpacked firmware and then flash.

I corrected the post https://xdaforums.com/t/alldocube-i...-some-minor-compromises.4212541/post-85615675
[Device Reviews and Information] Mad_god44:
thank you very much for the reply I managed to unlock the bootloader but sadly I bricked my device it will only power on and show the ALLDOCUBE can't use volume up + power and my pc can't see it in adb or fastboot if I use volume down + power it shows up in my pc as unknow device if anyone else has had this happen and know how to fix it would be a big help it wouldn't power off I had to let the battery die just to power it off
[Device Reviews and Information] AllexBast:
You need to flash your stock firmware. For example, here's a video

If you have a softbrik, then with the usb cable connected, hold the power button and the volume down button together. As soon as the process of writing the firmware goes, immediately release these buttons
[Device Reviews and Information] crosshelder:
Hi, i hade tried this way with ResearchDownload and i got my tablet brick, then i manage to download the official firmware version and i manage o put it to work again. My Tablet version is Alldocube iPlay40 pro T1020H, is this why i can't follow these steps?

I manage to unlock it but cannot root
[Device Reviews and Information] AllexBast:
Root only for t1020s. What firmware did you use?
[Device Reviews and Information] crosshelder:
For recover, after not turning on, was like completed dead, i used ResearchDownload and Rom iPlay40H(T1020H)_EN_20210805.rar from xxx.com i was able to turn it on again, and is workin fine. But i cannot install twrp and magisk to root the device.
[Device Reviews and Information] Mad_god44:
this is the only thing it does flash tools does not recognize it
[Device Reviews and Information] AllexBast:
Use this RD version https://mega.nz/file/5RFymB6Q#KjfDboHeduvuXvBi1SDLboO-48o0bmMhBC5FyTIwAVM

Inside the program there is a folder with drivers and they need to be installed
[Device Reviews and Information] Mad_god44:
wow what can I say you really know your **** bro I just got this tablet like a week ago when I braked it I didn't think ill see it working again words can't even describe how thankful I am for all the help you was THANK YOU AllexBast
[Device Reviews and Information] AllexBast:
Perhaps these sources code are suitable for our tablet

SPRD-stuff

GitLab Enterprise Edition

gitlab.rosoperator.com

GitHub - deadman96385/android_kernel_teclast_sharkl5Pro

Contribute to deadman96385/android_kernel_teclast_sharkl5Pro development by creating an account on GitHub.

github.com

GitHub - iscle/android_kernel_unisoc_ums512

Contribute to iscle/android_kernel_unisoc_ums512 development by creating an account on GitHub.

github.com
[Device Reviews and Information] AllexBast:
1
[Device Reviews and Information] AllexBast:
Ported twrp 3.5.2_10 realme C3.

Twrp is fully tested. Has a reboot point in recovery. I recommend it as the main one.
[Device Reviews and Information] kidpunk:
When you say it runs on encrypted disk, does that mean we can fastboot flash it without a modified vbmeta?

Also, is there a trick to getting "fastboot boot twrp.img" working? On my old phone I could issue the fastboot boot command to test out the recovery or boot images without actually flashing it, but when I try it on the iplay40 it seems to ignore/discard the image I uploaded and just reboots normally
[Device Reviews and Information] AllexBast:
There is no point in installing twrp on the stock firmware. Twrp does not work with encryption.

I managed to run the firmware android 10 from the realme C3 phone by replacing only boot, vbmeta and disabled protection in updater-script. Android 11 not available for T1020S
[Device Reviews and Information] Legoshi:
Scuse me guys, i'm new on xda here, i just wanna ask does any of you have faced a weird bug on iplay 40 pro? I bought mine a month ago and my unit is having a weird beeping and stuttering at random ocassions, i have tried resetting the unit and reflashing it to no avail. I even wrote a complain on alldocube official forum. I just want to know is there anyone else facing this problem? Thanks before😁
[Device Reviews and Information] ArthurAlex1:
Hi, nice work! Did you try to use iplay40H firmware Android11 to modify iplay40? I downloaded iplay40H firmware and try to use it to update iplay40's vendor, but I donnot know how to do it. Do you have any idea?
[Device Reviews and Information] AllexBast:
The firmware is not suitable for our tablet. Different screen matrices and touchscreen. Also I tried the firmware from teclast T40 plus, the same. Gotta go in a different direction. https://xdaforums.com/t/rom-11-pixe...e-iplay30-pro-t1012-t1012c-unofficial.4294203 . For example, he managed to run the firmware with the 11 android, having only a 10 stock of the android. Our processor has a lot in common with MTK
[Device Reviews and Information] ArthurAlex1:
Well, I actually tried to use T40 plus' firmware to make SGSI rom. After flash into our device, IT showed that data has been encrypted. Even I formatted data, it didn't work. Finally I gave up. What's your next plan? I don't think touchscreen is the key issue to upgrade Android11, the Unisoc T618 should be the key issue and it do work in Android11. Maybe trying to build lineage18.1 combined iplay40H's firmware is A way? I have no idea.
[Device Reviews and Information] ArthurAlex1:
GitHub - xiaoxindada/SGSI-build-tool

Contribute to xiaoxindada/SGSI-build-tool development by creating an account on GitHub.

github.com

Here is the SGSI build tool.
[Device Reviews and Information] AllexBast:
I cannot help with this, no experience