[Android General] Lullu_Coder12:
I am Successful in removing Mobicontrol from my LAVA T81N govt. Tablet.

WARNING: I just gave quick overview... this process has technical details... please try only when you have enough knowledge and take guide from youtube videos and websites for each steps...

Process without ROOT-

Method 1- Easiest Method

1) Setup you Tablet in Offline mode...

2) Go to Settings>Accounts> Add Your Gmail Account (You may receive Admin message of resetting device soon when you will connect to internet so don't worry just follow next step)

3) In Settings > Apps>Search for 'Google Play Services' > Clear Data > 3 options will appear clear all of them one by one

4) After Step 3 again search inside apps for 'Google Play Services Framework' and disable it

BINGOO!! now no MDM message will come again.

Note: After Disabling You can't add Gmail Accounts... but other features will works finely. If want to add more Gmail account enable 'Google Play Services Framework carefully and follow my above step again.

Method 2- Best for Techy..(Needs PC)

1) In this method we are going to flash PIXEL EXPERIENCE 11 GSI Image in our tablet.... as this Android 11 one doesn't trigger MDM issue.. And for backup and saftey from bootloop we need boot.img, dtbo.img, vbmeta.img.. files from you stock ROM..... Go to Setting>About Phone> Check Build Version.. Download Firmware according to it..

2) If You search on Google you may not find stock ROM of you version... So you can easily extract and backup you ROM using MTK Client tool in BROM mode

Use MTKCLIENT GUI 2.0 tool in BROM mode and easily backup you whole firmware to prevent BOOTLOOP if occurred, by flashing Stock partitions

MTKCLIENT GUI2.0 (EASIEST STEP)

Download Link: https://androidfilehost.com/?fid=15664248565197193211

Install UsbDk Runtime

Backup your ROM carefully... Don't backup user data partition

Get some extra guide from YouTube videos before doing that

OR

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2) Now Steps to flash GSI on your LAVA T81N....https://www.makeuseof.com/how-to-install-gsi-android/

Download any GSI from below links OR of your choice from given website Extract it using 7zip.

If you want, try downloading arm64-ab form this Website with all available GSI images

If you want Google ecosystem try Pixel Experience Android 11/12. It will be faster and have nice UI.

Pixel Experience android 11

Pixel Experience android 12

If you want Open-Source apps ecosystem, try Lineage OS android 10/11 Version.... It will be fastest.

Lineage Os Android 10 l

Lineage os android 11 vanilla

Download Minimal ADB and Fastboot

WARNING:: MUST FOLLOW FULL GUIDE

Download vbmeta.img and boot.img from below attachement OR (Not.Recommended)You can find it into your stock ROM maybe with different names... You can Compare it from BeTools Image i have attached or in your PC

You must place all vbmeta.img, boot.img, system.img inside minimal adb folder

Step 1- Downgrade (already done above)

Step 2 : Booting into recovery

Turn off your device

Hold Power and Volume Up until the device opens up the boot menu

Use the volume up button to get <<== this arrow to Fastboot Mode and then press Volume Down

The device will go to a screen saying Fastboot... in corner

View attachment 6019452

Now conect your PC and Open Minimal adb and Fastboot folder and type adb in address bar and hit enter

fastboot devices to verify connection

fastboot flashing unlock to unlock bootloader

You will have to say yes and do further process and you see on your screen by navigating via Power and Volume Buttons

Opening Fastbootd Mode to flash GSI

In Fastboot mode type fastboot reboot bootloader or Manually do in recovery mode by selecting Reboot to bootloader mode option

View attachment 6019449

Now Disabling DM_Verity or Android VErified Boots

fastboot --disable-verity --disable-verification flash vbmeta vbmeta.img

fastboot reboot fastboot

fastboot --disable-verity --disable-verification flash vbmeta vbmeta.img

Now Flashing GSI image

fastboot erase system

fastboot delete-logical-partition product_a this commands to increase partition sizes

fastboot delete-logical-partition product_b

fastboot delete-logical-partition product

fastboot flash system system.img

fastboot -w

Now Flashing is complete.

(OPTIONAL) factory reset your device from recovery mode by clicking wipe data and wipe cache partition one by one (DONE above with fastboot -w command)

Now REBOOT and ENJOY!!

fastboot reboot

ADDITIONAL: You may patch boot image with Magisk and flash it to root your system

(Below are Images of Pixel Experience 12 in my LAVA T81N)

View attachment 6019451View attachment 6019447View attachment 6019448View attachment 6019450