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HOW-TO Unlock, Root and get Xposed for Onn 8" Walmart tablet

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By tek3195, XDA Ad-Free Member on 3rd July 2019, 09:28 AM
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5th July 2019, 12:13 AM |#11  
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Quote:
Originally Posted by NFSP G35

Well... I got TWRP to boot... but the screen is portrait and the touch input is landscape

I really recommend compiling it from source code if you want to have any hope of it working correctly. To rotate the touch input you can try this in your BoardConfig.mk:
Code:
RECOVERY_TOUCHSCREEN_SWAP_XY := true
RECOVERY_TOUCHSCREEN_FLIP_X := true
...or some combination of those 2.

Quote:
Originally Posted by tek3195

What is this tool? @diplomatic I need some help with a different device. Huawei MediaPad T3_7. Can't find anyone with support for it to unlock the bootloader via online service. Sigma Key has full support but way to expensive for a hobbiest like myself. It has MTK MT8127 on Android 6.0 and I haven't been able to find a temp root solution or any other support for it. This is the 7th one of these I've owned but 1st one since no official unlock. I still have working TWRP and custom rom I cooked in Superr's Kitchen but no way to use them. Any thoughts on unlocking?

Well, you need to get root first to unlock it from Android. And I'm not sure it'll work on the mt8127....
 
 
5th July 2019, 12:16 AM |#12  
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Quote:
Originally Posted by tek3195

Thanks for link,haven't seen that one before.
Is there any particular reason to use mtk-su ?

Although not directly related I opt for mtk-su for simplicity and portability. No prep required other than changing permissions on the executable.
5th July 2019, 12:23 AM |#13  
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Quote:
Originally Posted by diplomatic

I really recommend compiling it from source code if you want to have any hope of it working correctly. To rotate the touch input you can try this in your BoardConfig.mk:

Code:
RECOVERY_TOUCHSCREEN_SWAP_XY := true
RECOVERY_TOUCHSCREEN_FLIP_X := true
...or some combination of those 2.

Yeah, I saw that in several guides. I fought with compiling from source several times and just can't seem to get it even close to working. It took several tries just to get the build to finish and even then it just boot looped.
Doing a repack was the only thing I could get to boot.
I'd prefer to build from source, but it's kinda overwhelming.
5th July 2019, 12:36 AM |#14  
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Quote:
Originally Posted by NFSP G35

Oh yeah, I forgot you had Magisk... Shouldn't need mtk-su then if you do from a terminal emulator.
I like using mtk-su so I can do everything from the computer via ADB shell

Ok cool, just making sure. Not trying to avoid or discount mtk-su, I think it's freakin awesome. But, you can also use adb shell from pc with Magisk. When you get shell and enter su you just have to grant permission for shell when prompted on device.
6th July 2019, 12:02 PM |#15  
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This is great!
Has anyone searched for a way to hide the walmart nav bar button?
6th July 2019, 12:44 PM |#16  
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Quote:
Originally Posted by blueberry.sky

This is great!
Has anyone searched for a way to hide the stupid walmart nav bar button?

Just use the Custom Navigation Bar app or adb commands to customize the Navbar.

You don't even need root.
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6th July 2019, 04:49 PM |#17  
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^ can confirm. Actually, I saw the post in my email and was coming here to answer, but creeve4 beat me to it lol
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8th July 2019, 12:47 AM |#18  
Wait, if it has Treble support, is it possible to flash an Android Q GSI whenever it comes out?
8th July 2019, 09:59 AM |#19  
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Quote:
Originally Posted by Pix12

Wait, if it has Treble support, is it possible to flash an Android Q GSI whenever it comes out?

Should be possible. Android Q Beta 4 GSI is out if anyone wants to try now.
xda-developers.com/install-android-q-beta-gsi-project-treble
8th July 2019, 06:55 PM |#20  
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Quote:
Originally Posted by NFSP G35

Yeah, I was going to mention that.
But here's the guide I used... If it worked on the 10, it should work on the 8...
https://forum.xda-developers.com/and...ource-t3843473

You'll just need to use mtk-su to pull your stock recovery image (***Make sure you save it!!!)
I also only got it to boot by using dd from mtk-su, for some reason the fastboot flash would take, but wouldn't boot... Furthermore, the tablet won't boot at all with a bad recovery (it will just boot loop) and can kill the battery. I nearly bricked one of mine. So do be careful.
The stock recovery image will flash via fastboot though, just have to make sure to erase first, and make sure you have a decent charge on the battery, otherwise fastboot won't let you flash.

Quote:
Originally Posted by tek3195

Hard to find much on or about these $64.00 tablets from Walmart, so I thought I would throw this out there. The bootloader is unlockable and it has project treble support. Support is A-only, no seamless updates. Magisk installed just fine and then Riru-Core and EdXposed. I don't know where one would get stock boot.img so I tackled mine by using mtk-su by @diplomatic. Once I got a root shell I used dd to dump boot.img with "dd if=/dev/block/by-name/boot of=/sdcard/boot.img". It looks weird but platform and soc weren't needed. Install Magisk Manager and let it patch stock boot.img. Transfer magisk_patched.img to PC. Tablet connected to PC use "adb reboot bootloader" once in fastboot mode use "fastboot flashing unlock" and follow on-screen prompts to unlock bootloader. Set tablet up again in developer options for adb as unlocking performs factory reset. Reinstall Magisk Manager then use "adb reboot bootloader" again and finally the money shot "fastboot flash boot magisk_patched.img". I'm not sure if it was helpful or needed but I then used "fastboot oem reboot-recovery" and wiped cache partition from stock recovery. After cache wipe completes, reboot system and go to Magisk Manager and check installation and updates then tend to whatever you think necessary. In the Magisk downloads section is Riru-Core and EdXposed which install same as any other module. From there I can confirm Gravitybox works, so far I've enabled the advanced power menu,navbar tweaks changed button color and button glow color and duration, also forced overflow menu. Bloat is very minimal on these with I believe 5 Sam Walton based apps which put up no resistance to pm hide command and later removal. I removed them (and then some) after making a backup with Advanced Tools Pro. Still in the process of finding out what should or shouldn't be removed. I stumbled upon a simply named but quietly complex root app by the name of Disable Application (ROOT) that is worth checking out. And of course fastboot and adb commands above are without the quotation marks. If you pick up any of my bad habits from reading the above, which in turn have any ill effects on your device, I am in no way responsible. In other words, wuzzn't me.

How do you get to fastboot mode? When I tried it with the one in the store I managed to get it to the menu where you can choose recovery, bootloader/fastboot, or normal boot but it just froze after choosing fastboot. Which I thought meant that they removed fastboot entirely like some other tablets do.
8th July 2019, 07:22 PM |#21  
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@nl13142



If you enter fastboot with hardware buttons that's it. It stays mid-screen or so with the arrow pointing at fastboot. You have to select it with volume - for it to actually go into fastboot. There is no indication as to whether you've just stopped scrolling or made a selection I am NOT a fan of what I guess is what I see people referring to as bootloader screen. If you enter fastboot with "adb reboot bootloader" fastboot will be in x-small font bottom left of screen.
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joyar, ona19tb002, onn, onn_8"_tablet, walmart

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