HK1 RBOX X4

HK1RBOX-X4
Amlogic S905X4
Specifications (adb shell getprop)

ro.product.build.fingerprint]: [Amlogic/ah212/ah212:11/RQ3A.210805.001.A1/user12212324:user/release-keys]
[ro.product.build.id]: [RQ3A.210805.001.A1]

GPU (adb shell dumpsys SurfaceFlinger | grep GLES ) :

GLES: ARM, Mali-G31, OpenGL ES 3.2 v1.r25p1-01bet0-6a4488b89-0567174f3.3ce44ab07ffe09dde7ee2f5999c7dd83

Backup original ROM
https://slimboxtv.ru/obnovlenie-proshivki-s-soxraneniem-dannyx-v-usb-burning-tool/
Custom ROM
https://slimboxtv.ru/transpeed-x4-x4s/
Procedure:

Start the Amlogic Flash tool with administrative privilege
Load the custom image
Leave the options by default (erase flash, etc)
Press the start button
Push reset button located inside the audio/jack connector
Plug the USB to the PC
The USB2 connector (not the blue one) is pretty tight so to avoid bad connection, put the box on the side having the USB port facing the ceiling. Don't move at all during the process.
Wait for the flash to proceed

Configuration

Update Magisk app and system using Magisk app

Configure systemless hosts file
Configure denylist

Enable all slimbox features in the internet menu

Install basic packages

AdAway
Amaze
F-Droid
Firefox
Neo Backup
NewPipe
Tivimate
VLC
WG Tunnel
Wireguard

Update all packages

Freeze APKPure package
# Find package name
adb shell pm list packages -e | grep -i apk
# Disable/freeze package
adb shell pm disable com.apkpure.aegon
# Stop all processes
adb shell ps -Aw | grep -i apkpure
# Grab the PID above and kill processes
kill ${PID}

WireGuard Configuration

Add the below line in each conf file located in /data/data/com.wireguard.android/files :
IncludedApplications = ar.tvplayer.tv

Configure the "Always-on VPN" settings in the "Network & Internet" settings

Install Viper4Android
https://github.com/programminghoch10/ViPER4AndroidRepackaged
Download latest package and install using Magisk.

Troubleshooting

Check the current network connections
adb shell netstat -lpeWt

Infos
https://androidpctv.com/firmware-hk1-rbox-vontar-x4-transpeed-x4-rom/