[Android Q&A, Help & Troubleshooting] NMaverick:
I just received my Doogee V30T and started customization. (https://www.doogee.cc/products/v30t.html)

So far I have came upon some minor issues, some of which you'll find below:

1) I have searched everywhere for a NANDroid backup and restore method. There is no separate recovery partition and the stock recovery does not support such functions, but I have not given up yet.

2) Booting now shows with small letters the following message:"Orange State, the device is unlocked and cannot be trusted. Booting will continue in 5 seconds". I don't want my device to show this message and wait 5 seconds, but it seems it is a necessary caveat because I have unlocked the bootloader.

3) LSposed installer works, and there is a Gravity Box module for Android 12.

edit: Oct 1st, 2023

There is a working Gravity Box module for Android 12, which I am currently using with some functions not working, but it is sufficient.

Thank you all

A. How to install adb and Fastboot Driver

B. How to install VCom Drivers and the Vcom installer

C. Download the Doogee V30T Original Firmware here (RU=Russian, EEA=Europe, NOEEA=Other Region)

D. See below

I. Flash the original Firmware

Run SP Tool\SPMultiPortFlashDownloadProject.exe (For Original Unrooted version), select MTK_AllInOne_DA.bin from SP Tool folder and MT6877_Android_scatter.txt from e.g. DOOGEE-V30T-EEA-230613 – full_k6877v1_64_k419-user 12 folder (unzip the file)

Shut Down Smartphone, (see video for procedure).

Flash firmware (Start All)

or

Scan

to find port.

When flashing is finished Power up the phone and setup initially.

Do not Restore from previous backup

.

II. Root with Magisk and Hiding the Root

Go to smartphone Settings, about Phone, click 8 times on Build number to become developer.

Turn on

OEM Unlocking

and

USB debugging

Install

WS_FTP

from play store for easy transferring files, set it up and start it

Download e.g. Magisk-v26.1.apk in your smartphone from https://topjohnwu.github.io/Magisk/install.html

Transfer boot.img as boot-verified.img image to SD Card of your device and and download the files safetynet-fix-v2.4.0.zip and safetynet-fix-v2.3.1-MOD_3.0.zip (Google search)

Press the Install button in the Magisk card and choose “Select and Patch a File” in method and select boot-verified.img image to produce boot-magisk_patched-26100_0sp6x.img

Start the installation, and copy the patched image to your PC using an FTP Server app

Download platform-tools (Google search) and copy patched boot image as boot-patched.img and start a command line prompt at this location and type

adb devices (Allow access on Smartphone)

adb reboot bootloader (phone reboots into bootloader)

fastboot flashing unlock (it will void the warranty)

fastboot flash boot_a boot-patched.img

fastboot reboot

Reboot (you get the message your phone is unlocked and cannot be trusted.

In Magisk go to settings

Tap on Systemless Hosts

Enable Zygisk

Enforce Deny List

Configure Deny List, 3 dots, system apps, Select Google Play Store (there may be other apps that need to be put here in order for them to work e.g. Banking apps)

In Modules enable/install Systemless Hosts, safetynet-fix-v2.4.0.zip and safetynet-fix-v2.3.1-MOD_3.0.zip

Reboot

Download and check that root is hidden with YASNAC, SafetyNet Test and Integrity Checker (Strong Encryption will be red, but it's ok) for successful test and then Add cards to Google Wallet if you use it

If you install Paragon Root Mounter, go to Settings, SELinux and set SELinux Policy to Enforcing and disable Set SELinux to Permisive automatically on boot

I have tested all the above myself and I have confirmed that the procedures work.

Thank you all