[Android General] rbt07:
It is not necessary to install TWRP recovery or unlock Bootloader to get Magisk.

The proof is my hybrid ROM Version 1.1 - version 1.0 plus pre-installed Magisk (Root) Here, Magisk was loaded with a modification of Boot.img.

I have prepared hybrid ROM 1.04 / 1.05 (Android 9) -> its suitable for all Teclast T30 hw versions

Its based on official global ROM 1.04 and chinesse 1.05 ROM.

In the folder with firmware 1.05, I replaced the scatter file and system.img from firmware 1.04.

The result is:

Version 1.0: firmware 1.04 with Google Play store and 60 Hz screen frequency, better touch response, containing all languages.

Version 1.1: same as version 1.0 + Magisk (ROOT) pre-installed

Version 1.2a: same as version 1.0 + TWRP 3.3.1 pre-installed

The big advantage of this procedure is the standard easy installation of the firmware via Flashtool.

Download:

Version 1.0 - Initial, first version (60Hz screen refresh rate), better touch response

Version 1.1 - version 1.0 plus pre-installed Magisk (Root)

Version 1.2 - version 1.0 plus pre-installed TWRP 3.3.1

Installation 1.0:

- Unpack FlashTools, and Click on Flash_tool.exe

- Select "scatter-Loading" and search MT6771_Android_scatter.txt in ROM

- Wait file to be added into Flash Tool

- Select "Firmware upgrade"

- Turn off your tablet.

- Press “Download” button to start

- Connect your tablet into the computer via USB data cable.

- The process will start and a red progress bar will appear after color purple, yellow.

- And green circles display

- Finish !

- Reboot System

Installation1.1:

- Unpack FlashTools, and Click on Flash_tool.exe

- Select "scatter-Loading" and search MT6771_Android_scatter.txt in ROM

- Wait file to be added into Flash Tool

- Select "Firmware upgrade"

- Turn off your tablet.

- Press “Download” button to start

- Connect your tablet into the computer via USB data cable.

- The process will start and a red progress bar will appear after color purple, yellow.

- And green circles display

- Finish !

- Reboot System

- Install Magisk Manager v7.5.1 or Magisk Manager v8.0.3

Installation 1.2a:

- Unpack FlashTools, and Click on Flash_tool.exe

- Select "scatter-Loading" and search MT6771_Android_scatter.txt in ROM

- Wait file to be added into Flash Tool

- Select "Download only"

- Turn off your tablet.

- Press “Download” button to start

- Connect your tablet into the computer via USB data cable.

- The process will start and a red progress bar will appear after color purple, yellow.

- And green circles display

- Finish

- Do not start tablet by normal way!!!

- To go to TWRP start the tablet by pressing and holding the Power and Vol+ buttons simultaneously, until text menu on tablet will appears

- On the tablet screen, use Vol+ to select "Recovery Mode", confirm the selection with the Vol-

- To control the TWRP connect the mouse to the tablet, because touch do not work in TWRP

- Click Cancel when prompted for a password

- Click on Wipe / Format Data / Swipe to confirm

- On question enter "yes"

- Click Back (3 times) and click to Reboot / Recovery!!!

- Install "DisableForceEncryption_Treble.zip"

- Install Magisk 21.1

- Click Reboot System

- Install Magisk Manager v8.0.3

- To easy access to TWRP instal Recovery reboot application

Note. Unfortunately, the touch does not work in TWRP, so a mouse and USB adapter must be used