Password Locked Developer Mode - Android Q&A, Help & Troubleshooting

Hi Folks!
I have a generic china tablet, MT8163 based, Android 8.1. Model KTE108A, a tablet from a coaching trainning,
Unfortunately it requires a password to unlock the developer mode. I have the original stock rom extracted directly from him, maybe a can extract the password from rom?
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I've read quite a few posts here, I've already used the 7890XX trick, where xx is the hours.
Is there any other way out? I made great advances, I managed to extract the stock rom from the device itself and generate a valid scatter file using the hovatek tutorial, but I didn't find any rom that was compatible without brick (I've resurrected it a few times)
Anybody can help-me? I've extra infos about mainboard and spec if can really help.

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El_comentarista said:
Hi Folks!
I have a generic china tablet, MT8163 based, Android 8.1. Model KTE108A, a tablet from a coaching trainning,
Unfortunately it requires a password to unlock the bootloader. I have the original stock rom extracted directly from him, maybe a can extract the password from rom?
I've read quite a few posts here, I've already used the 7890XX trick, where xx is the hours.
Is there any other way out? I made great advances, I managed to extract the stock rom from the device itself and generate a valid scatter file using the hovatek tutorial, but I didn't find any rom that was compatible without brick (I've resurrected it a few times)
Anybody can help-me? I've extra infos about mainboard and spec if can really help.
Click to expand...
Click to collapse
@El_comentarista
Welcome to XDA. I hope you'll always get the support you require.
However, prior to your next posting please read the guidances that are stuck on top of every forum like
Note: Questions go in Q&A Forum
If you are posting a Question Thread post it in the Q&A forum. Technical discussion of Android development and hacking. No noobs, please. Device-specific releases should go under the appropriate device forum...
forum.xda-developers.com
and the others. I've moved the thread to Android Q&A. Thanks for your cooperation.
Regards
Oswald Boelcke
Senior Moderator

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Oswald Boelcke said:
@El_comentarista
Welcome to XDA. I hope you'll always get the support you require.
However, prior to your next posting please read the guidances that are stuck on top of every forum like
Note: Questions go in Q&A Forum
If you are posting a Question Thread post it in the Q&A forum. Technical discussion of Android development and hacking. No noobs, please. Device-specific releases should go under the appropriate device forum...
forum.xda-developers.com
and the others. I've moved the thread to Android Q&A. Thanks for your cooperation.
Regards
Oswald Boelcke
Senior Moderator
Click to expand...
Click to collapse
Thx Oswald! im waiting for any tip!

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please explain
- password locked developer mode
- password locked bootloader

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aIecxs said:
please explain
- password locked developer mode
- password locked bootloader
Click to expand...
Click to collapse
Developer mode. My tablet need some password to entering in developer mode. i need activate some options to instal a GSI rom from project treble.

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never seen this before. what you can try is unlock bootloader with mtkclient + fastboot, then root with Magisk. maybe it's that what you want?

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aIecxs said:
never seen this before. what you can try is unlock bootloader with mtkclient + fastboot, then root with Magisk. maybe it's that what you want?
Click to expand...
Click to collapse
Actually alecxs, I'm looking to install a rom with android. The Android that came by default on the tablet is a modified build, which persistently opens an app which makes it impossible to use it. This tablet is like the ones that waiters have to send customer orders to the kitchen.
Overall, I was able to extract the stock rom from it using a hovatek tutorial. I have the stock rom and the scatter file. I would like to install a rom that works like a normal tablet. I've tried scouring the internet using the mainbboard model and all the roms I found gave a softbrick.
I'm now trying to install a GSI on it. But I can't with without access to developer mode. I tried flashing a modified version of the bootloader via magisk, but it stuck in bootloop.

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please don't mix up bootloader with boot. you probably flashed magisk patched boot.img. usually it will completely deny booting modifications on locked bootloader. the fact it stucks in boot-loop indicates it somehow successfully passed android verified boot, just struggling with something different (for example encryption)
you can install GSI if device is treble ready
Treble Check - Apps on Google Play
Check your device for Project Treble support and more
play.google.com
what you describe sounds like kiosk mode to me. But one can't flash random ROMs just because it have the same Mediatek SoC. each ROM has to be build especially for that device (except GSI)

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aIecxs said:
please don't mix up bootloader with boot. you probably flashed magisk patched boot.img. usually it will completely deny booting modifications on locked bootloader. the fact it stucks in boot-loop indicates it somehow successfully passed android verified boot, just struggling with something different (for example encryption)
you can install GSI if device is treble ready
Treble Check - Apps on Google Play
Check your device for Project Treble support and more
play.google.com
what you describe sounds like kiosk mode to me. But one can't flash random ROMs just because it have the same Mediatek SoC. each ROM has to be build especially for that device (except GSI)
Click to expand...
Click to collapse
You are right. I actually tried flashing an image modified by magisk, which caused the bootloop. I had already checked the treble project is compatible. Wouldn't I have to have developer mode access to install it? Anyway, I'll try it now and get back with the results. Thank you in advance, it's been 4 days in this game here.

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what you mean is probably DSU Loader which afaik is available for Android 11+
In your case it's different, you must unlock bootloader and flash system.img directly.
unlocking bootloader requires OEM unlock toggle in Developer Options as prerequisite, then unlocking from fastboot (with/without unlock code)
you could try to by-pass the password with such apps (there are several on google play)
https://play.google.com/store/apps/details?id=com.singlebyte.devshortcut
or just enable OEM unlock "offline" from mtkclient as suggested.
not sure about the second step though, you mentioned bootloader unlock code - would still required. I have seen brute force attempts for this, but will probably take ages...

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aIecxs said:
what you mean is probably DSU Loader which afaik is available for Android 11+
In your case it's different, you must unlock bootloader and flash system.img directly.
unlocking bootloader requires OEM unlock toggle in Developer Options as prerequisite, then unlocking from fastboot (with/without unlock code)
you could try to by-pass the password with such apps (there are several on google play)
https://play.google.com/store/apps/details?id=com.singlebyte.devshortcut
or just enable OEM unlock "offline" from mtkclient as suggested.
not sure about the second step though, you mentioned bootloader unlock code - would still required. I have seen brute force attempts for this, but will probably take ages...
Click to expand...
Click to collapse
Thx for the tips.
I had already tried mtkclient, however I get this error at the final stage of the process:
"Unknown seccfg partition header. Aborting unlock."
And from there I can't do anything else.
The devshortcut doesnt work, needs manually activate developer mode.

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so you can't do nothing not even bootless root method because lack of usb-debugging?
unpackimg boot.img with AIK and modify default.prop / prop.default
Code:
ro.debuggable=1
persist.sys.usb.config=mtp,adb
devshortcut app is 10 years old btw so try other similar apps

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or try mtk-su from termux. termux has less privileges than adb shell, but diplomatic posted instructions so it might work too...
then you can just access settings from cmd line
Code:
settings put global development_settings_enabled 1
settings put global adb_enabled 1

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Have you tried hitting cancelar? I have run into things like this, hit cancel and kept right on going. I think because there is no password. If the cancel doesn't work, you can also try just hitting OK with password blank.
Don't assume.